BadgerRivFan
Keep the Blues Alive!
My short-version advice is to learn how to wash a vehicle without marring it. Infinitely more difficult that most would ever imagine but arguably the single most important aspect of detailing. IMO the stuff most people think about (e.g., "which wax is best", "how do I polish out these flaws") is all secondary to not messing up the paint when washing/drying.
Sage advice indeed.