Thanks for the replies! Santiago - going back and reading the article helped out, thank you. I'm still slightly confused, but I think it'll just take more experience for me to learn when to use what brake.
Trust me, this hasn't discouraged me in the least. I'm accustomed to flying off horses, so falling off a bike is a walk in the park.

I always think of "misfortunes" like this as learning experiences, and honestly I'm sort of glad it happened--I finally got my first crash (since I started riding seriously) out of the way.
Originally Posted by BugsInMyTeeth
But, more importantly... is the BIKE OK!?!
I think so... we got the handlebars and saddle aligned again to the point that I could ride another lap around the trail, but it still needs an adjustment. Nothing too major, I don't think.
My shoulder and elbow are killing me, though.