repertoire and skills aren't as good as I'd like at the moment.

Well, the good thing about storytelling is that you don't need official venues to get better. While you're waiting for the RSVP, you can ell stories to your friends, around campfires, at the pub, heck, even waiting in line at the bank (remember, most jokes with a punchline are just very short droll stories -- you can use them to practice your timing, and you won't be asking your listeners to sit still for 5-10-15 minutes).

I don't know about where you are, but here in America there are storytelling circles, where storytellers can get together, learn new stories, and polish up old ones -- sort of like playing sesssions for musicians. It's worth looking into, at least.