Hahaha. Here are 4 different blogs I created for 4 different reasons, not including the ones at http://gparmer.spaces.live.com/ . Delete this now and save yourself some time. :)
There are lots of reasons to blog, and the penalty for "jumping right in" isn't as high as some will tell you. I rather liked jumping in and then abandoning what I didn't like. It works for millions of teens and it worked for me.