Paasche Talon. Available on Amazon at many price points. I’d get the one that has 3 needles. It’s probably not considered a beginners airbrush considering the price. I would suggest their single action brush rather than the Talon which is a double action. But they are easy enough to get use to and I think they are a little better at weathering. They are very user friendly and clean up easy. Parts are readily available if needed. There are many cheaper options out there. But this is something you seem to what to do. I’d just start with a quality one rather then get frustrated and give up with a sub par one.
I also have a Paasche booth. Decent size and have had it a long time with no issues other than routine filter changes.
I have tried every paint on the market and a lot that are no longer made. My go to paint these days is Tamiya Lacquer. Sprays consistently and cleans up easily. It’s also well stocked at 2 local hobby shops. While not exactly RR Color based. They make colors for weathering that just might have different names. I’ve always preferred solvent based paints. Flouquil was the best and I’ve used Scalecoat and True Color.
I’ve tried my fair share of water based. While they all work. I think it’s harder to keep the airbrush squeaky clean. It seems your always disassembling it to give it a good cleaning. If I had to pick a paint. It would be Vallejo or Mission Models.