Hi
@Kaleb, glad you found this awesome bonsai site! (It helps to put your location in your avatar box, in case you have questions later on.)
Your little tree looks like it is surviving. I always like to fiddle around with stuff like this that has to be gotten rid of anyway, why not learn on it? Just try to ignore your thoughts on "what shall I do next" while it recovers strength.
I know that, for many, locust tree leaves are considered too large for bonsai. I have several sugar maples that I dug up from my flower beds. The leaves are way too big but I like them anyway. They are definitely "sticks in a pot". My opinion is that if it's fun and helps you learn, then do it.
Good luck and have fun!