Just because you're not good at something is no reason to quit it!
It may be a reason to not do it professionally (I and I think many others here you will never find singing on a CD

) but there's no reason not to do it for yourself. And with most things, you will improve with practice. Webpages for sure - my first webpages were pretty crappy, but they got better (I'm still not very good with graphics editing, though, so I usually just find free clipart on the net, or suffer through some photoshop tutorial if I have to make it).
One thing that helps is find someone who's good at what you want to do - a teacher or mentor of sorts. Or a group - a class or a community group. That way you can give each other comments & critiques, learn from other people's mistakes, etc.
But don't give up - esp. so early in the process. You might need to readjust your "goals" a bit (ie not "I'm going to be the Leonardo da Vinci of web-design!" but rather "I want to make nice-looking web pages"), but you can do it!
