I do not know how funny I am. The problem is how funny are you going to be with her or how interesting is your company with her. You might want to make her laugh but at the end of it, it might not be funny and it is always frustrating for a guy that likes a particular girl and wants to date her.

Just be polite and don't try to say anything that may be presumed as offensive until you get to know her and what's safe and not safe to talk and joke about.