The original post is several years old, so you may not get many responses. There are probably 1000s of videos and articles that you could read and get different information. My suggestion is to start out small. Pick a few colors you think are good and give it a go. Some suppliers sell starting kits of paint, that include a handful of colors at a lower price. The paints are lower volume, so overall you will want to expand and buy other paints someplace. Check out barlows, lureparts on line, etc.
Do It Molds created a bunch of videos for those starting out that may be of helpful. They cover various topics. If it helps, here is a link. https://store.do-itmolds.com/how-we-do-it-finishing-and-paint-videos
Hope it helps.