Not sure if this is the correct place to post my questions.

Hi guys, i'm new here and just started to Gunpla. Getting more interested in it, would like to know more about painting it with airbrush and stuff.
Can you guys guide me where to start? Like what airbrush and compressor recommended that can last long without breaking the bank? Anything else that i might need to know?
And the most important part is how to spray indoor inside a room? DIY spray booth/ or some portable booth? the portable ones seems expensive and where do you place the exhaust outside the house? just leave it hanging out the window? Will the fume stains the wall or floor, just outside my room is a grass patch and i don't want my grass to change color lol. Thanks for answering.