Everything is ok.
Don't worry about damaging the Wiki.
It would be extraordinarily difficult for you to do so.
Everything you put on the Wiki can be changed later.
Don't worry about what other people think.
Think positively, contribute positively.
Your contributions will be appreciated.
Play around, explore, this is your sandbox.
Put stuff up. If you don't like it, take it down.
Everything will be fine.
Follow this link for more information on: Working with the Wiki