>>10289478It's an art that takes a lifetime to master but you can learn and get started. You will never match that promo image, but only a handful of people ever do.
If you want to mess with it and see if you enjoy it, get a Megami Device or FAG and some Tamiya Weathering Master H or G and some Mr. Super Clear Flat. Mess with that and make some coomer customs and see how you like it before you look into the deep end. or better yet. a 30MS.