A Local Technical School in my hometown gave a course called :Powder Puff Mechanics" that was good. We learned to Check Air in Tires, Oil/Fluids, How to Change a Tire using Several Types of Jacks, and How to change a Spark Plug, and Belts.
Routine Stuff, you can do.
One thing I found is that if you can talk intelligently to your mechanic, you are less likely to get ripped off. I applaude you for starting this thread. I hope some really knowledgable people will go over the basics--like if it sounds like this then check that.. I would find that interesting on a basic level.
PS Welcome to ABle...