I am Sooooo Confused over Paint

Paint is a tricky subject. I did body and paint for 20years. You can ask 100 guys and get 100 answers. My advice to you is educate yourself as much as possible. Go to shops and talk watch videos etc. Generally with paint you get what you pay for in terms of material. But nowadays there are many good lower priced alternatives. The best thing i can recommend is start with quality materials from the bottom up. Epoxy first then body work. Good primer/sealer. After that topcoats are about all the same nowadays