I am Sooooo Confused over Paint

The title says it. '68 Dart. I will try to lay all the paint myself since I don't particularly need a show-car finish. Just want it to be acceptable, not exceptional. It'll be a weekend driver. Not a lot of straightening or filling to be done. No paint booth available. I don't want to spend an arm and a leg in a paint shop and wait forever to get something back that may or may not meet the "acceptable" criteria. So, I'm investigating paint, methods, etc. trying to educate myself before I waste time and money. Watching videos, reading articles, but I tell you they seem to be all over the board. Example: Eastwood has about 3 (maybe more) different brands of primers that they sell (Eastwood, Evercoat, POR...) and two or three different primers (expoxy, self etching..) and two or three different primer/fillers. To complicate matters, the properties of each seem to overlap; (high build, sandable, excellent adhesion over all sub-strates...); they all do it all. Eastwood labels required catalyst; Evercoat and POR seemingly don't. So which one to pick? The cheapest? Highest rated? :BangHead:

Then, there's equipment. HVLP, Conventional Gravity, Conventional Siphon....

Then there's color coat. Single stage, base coat/clear coat,...

What do you do with engine compartment? Is there a single paint "type" good for both engine bay and exterior body?

Under trunk lid, under hood, trunk, door jambs/hinges, etc. the same paint as the rest? But what if I'm using base/clear? Do you do those areas the same, or is a single stage appropriate substitute for those seldom viewed areas?

Ultimately I know that no one can make these decisions but me, but dang it, it's got my head spinning. I don't want to go spend hundreds on the wrong and/or incompatible stuff.

Is there a "Car Painting for Dummies" book out there somewhere?