It is a little difficult to just jump in to your design...what is the 36x62 notch out? Chimney? Stairs? It would make a difference regarding the 36x58 space you indicate is available...if a landing for stairs....or a "dead end corner by the chimney"...get my point?
Where and how do you enter the room?
Would you be comfortable with a duck under or a bridge of some sort?
All that aside, I am not a "classic runner"...I prefer a fair amount of prototypical freight switching. I have a provision on my 19ftx15ft layout for continuous run, but do not plan to use it during regular "freight operation" sessions. But if guests drop by who are non railroaders...at least I can "run a train" and show off the layout.
Since freight car movements are important to me, my scenery will be a lot of building flats against the wall...and a few full "3-D busildings" on the peninsula.
So, most of the layout design will depend on things YOU like.
Such as:
Do you like to follow your train around the layout, or do you like to stand in one spot and run? I prefer a shelf style vs a "table". What do you think you would like?
Open country vs rural town vs urban industrial. If you kind of like two of those options, consider using one side of the room for one large scene with a transition to the second scene on the opposite wall...such as small rural community with just a pass track and a couple of spurs to a feed elevator, team track and maybe a fuel dealer and lumber retailer (considering Atlas/Walthers structures and/or MTH structures and Lionel elevator)...then on the "other wall" simply have "the city and yard". Maybe a small handful of tracks along the back wall servicing the warehouses and local manufacturing facility...with a yard between that and the aisle.
Do you like to stop the train and set out cars...a lot? Or occasionally? You can keep busy for a couple of hours just switching a half dozen industries in that "urban scene"...then "run your train" over the mainline (one lap, multiple laps, whatever) to switch the small town and "run your train" back to the yard to break it down, put some cars on storage tracks or on a local track to be switched out by the next day's local switch crew. Or you can just run thru to see the trains move thru scenery...
So, you need to decide..."around the wall shelf with a linear track plan"....or a "train board with lots of routes and loops and such".
Here is how I started...and some of "why" I did it this way:
I decided what was important "to me". I also knew that 99.9% of the time, it would be "just me"...so the layout was built "for me".
I measured from my arm pit to the floor...knocked off a little so I would not drag my arm flab over the track, cars and switches...so my bench work is approximately 53 inches above the carpeted floor. (PERSONAL COMFORT WAS AN ISSUE!) I also have baseboard electric heat and a window air conditioner. My layout is in a 16x20 custom built on site storage building. The AC is in the only window and even that is UNDER the layout shelf. As you step up into the room, you simply duck your head and shoulder and take one small step into the room...the shelf over the door is narrower than the rest of the room. I realize that may be an issue for some, but even with my LARGE girth and my arthritis, I am able to get into the room without pain and without bumping my head or back on the bench work.
I hate tight radius. The overhang of rail cars going around curves simply ruins the visual effect. I probably should have gone 2 rail, but elected to get the more "plentiful" options in 3 rail...all my turnouts/switches and all my curved track are O-72 radius. I used track planning software to let me know everything would fit...had it not, I was prepared to use a limited number of O-54 in critical spaces...but I was lucky and planned ahead. I was also able to arrange to view all curves from "inside" the curve so the "overhang" that bothers me so much is not a factor.
Truth in advertising...my layout is not functional at this point. I pulled all the track and did some "prep work" that I should have done first...and now, I might pick up some Homasote to replace some "patch in pieces" for a smoother surface. But when I leave my current job this Spring, I will spend a minimum of one day each week on the layout.
My suggestion to you is to think beyond "what I did before but simply bigger" unless you really liked what you had in your previous layout. Consider layout height, floor covering, HVAC, lighting, layout access. THEN think about track plan and scenery.
Originally, I was going to have one small rural town and a nice run thru some rural area with a rock crusher. (My part of Oklahoma is NOT coal country.) But I realized that even that would not give me the traffic intensity I wanted. I have figured that I ought to be able to spend a little more than 2 REAL hours working a full "day" or "shift" on my industrial switching layout...I hope to move around 12-20 cars in "a day/a shift". My yard is small (main, runaround, two "working tracks" to hold cars or to sort cars for deliver to the layout or for return to the main yard. Beyond that, there is only one other runaround track...so that will get a fair amount of use during operating sessions.
In case you are wondering, my layout is a very fictionalized version of reality...I am modeling the 5 mile long ATSF switching district that stretches from north-south mainline from Kansas City to Galveston in Oklahoma City that accesses the Okla City National Stockyards and the adjacent packing district. Since I grew up loving the ATSF zebra stripe paint, I am modeling 1963ish, the end of the paint scheme and about the end of live stock shipments in/out of the Stockyards via rail. Refer cars still moved for a few more years, but within 12-15 years most of the packing plants were closed.
That is my approach to your new space...consider the possibilities...consider the things that you liked and disliked about your old layout...consider how to access the distance across a large board compared to a 30 inch shelf around the room. That shelf does not have to be a straight line 30 inches wide, either...you can always have a bump out to allow for an "aisle side industry" or other mini scene. A duck under does not have to be a "duck under" but could be a "sit in an office chair and roll into the layout." You have a wealth of possibilities...
I hope something in the above helps more than it confuses.