Artists love creating other artists. We all mostly remember the hundreds of a-ha moments that changed our view of the world again. It's sad how eager most of us are to share the knowledge. :)

Depending on where you are, you may do well to find a tiny studio with good reviews on yelp or, if you're near a school, look for tutors.

In the mean time, definitely keep doodling but occasionally try to doodle something you can see. Then laugh at it and shade a sphere or a cone. :)

This is one area where everyone has potential. You just need to develop it with some basic tools, most of which involve ways of seeing.

Not that I'm aware of. I've seen classes labeled as "Fundamentals 1," "Fundamentals 2," etc. I guess just like any other class or course, a lot depends on the instructor. Don't let a bad experience keep you from looking for other courses, just inquire in advance what the course will be covering.