Do I have potential as a comedian?

I'd say you have definite potential. There are four main categories for being a comedian, and that's how funny your jokes are, how well you present, how easily you are able to improvise, and how you word your jokes. The first and fourth categories are obviously no problem for you, but we won't know about the second and third. :) Just don't laugh while you're telling the jokes, don't backtrack, and make sure you speak really loudly. The improvisation thing is just talent. It seems like you have some good talent here, so you'll probably do well if this is something you really want to pursue. :D