I love jokes, but I am so bad at telling them.  I have no timing.
Jokes aren't too hard to tell. They're just displays of humor in which words are used within a well-defined narrative! You gotta get better at telling stories.
Stories I can tell, but jokes just escape me.  I think if I knew the structure of jokes better I would enjoy stand up comedy less, though.
You can't forget the punchline! Maybe that is your problem?
Yeah, if the punchline is messed up at all the whole joke falls apart.  I'll tell you what, though, I think Jerry Seinfeld is the greatest joke teller of all time.
Jerry Seinfeld is an excellent comedian. I really enjoyed his show "Seinfeld" when it aired from 1989-1998.