Flyign Theston is great. I’ve also learnt a lot from bennyboy444 on youtube - https://www.youtube.com/watch?v=WJONORUr44Y&list=PLiEKiz8ROD3BdJTzWJvYZb96Qv8eg1R6L
I’ve probably had more solutions from this forum than anywhere else but - https://www.fsdeveloper.com/forum/forums/fs2020-airport-design-general.156/ has many people doing the same thing even if many a thread seems to sit there and do nothing.
I can’t really think of anywhere else that I’ve consulted. Most of it has been trial and error.
If there’s anything particular you want to know I may not know it but I might be worth asking.
I find it’s fastest and easiest to run straight at something, have it fall apart around you and then improvise your way out.