This is an original, and it's my first ACEO ever! I've always been a doodler, so I thought I'd give it a shot. I HAVE NO TRAINING (which may or may not be obvious - I don't even know that much).
Here's the deal: instead of taking a class, I'll use ebay feedback as my instruction. If a piece is popular (lots of views, watchers, or, *gasp* bids) I'll take that as an indication of being on the right track.