Just buy yourself a set of Rhinoramps (~$50) and start with that. A good first job is an oil change--you'll need a pan to drain the oil into, a ratchet/socket to get the drain bolt out, and an oil filter wrench as well.
If you read that and think to yourself "gawd, I have to buy all that just for an oil change!", then you might want to rethink your DIY aspirations--otherwise, go nuts and have fun. Wear some safety glasses while you are under the car.