Yo!!! Dont worry dude!!! Whatever you need just post an topic here and we'll try our best to help you out.
BTW people learn from mistakes. So youll learn things when you start messing around.
Lol yesterday I screwed my whole site. It wasant connecting to the DB. But then I got it fine later and also learned what the mistake was and what has to be done
BTW would like to suggest you something. Just sign up for an account at any one of the free web host available online. Let them have ads or whatever. You dont need to host there. Just try out stuff there and try installation of blogs and other stuffs aswell as just try out a dummy blog there.
Ther's nothing you got to loose. I learnt that way. Not only blogs but lol I even tried out forums and what not
Its really exciting.