“Just do it.” – Nike slogan
When in doubt, just do it. I would rather try something new, with an open mind, and find out that I don’t like it as opposed to not experiencing new things. At worst (in most cases), you can give an honest opinion if someone asks you about a subject or an event (like going skydiving). At best, you can find a new hobby or passion that you never would have known about if you hadn’t tried it.
Why live your life in fear (of getting hurt, of “failing,”, of wasting time, etc.)? Go enjoy new experiences!
Tip: Try doing whatever it is (as long as it’s not harmful to your health) with your partner, a friend, or in a group (where you can make new friends). It will probably be more enjoyable.