First time blogger

It's funny, I was talking to a friend this weekend while shopping and she was telling me about her blog. I thought to myself, what the crap is a blog? So I went home and read hers. I've heard about blogging for years and never bothered to look into it.
I read some that seemed like the person writing it was 12 and dying of boredom...
Some were great and very informative. Personally I'm not sure if putting my serious thoughts out there is going to be an easy thing for me. First of all, I don't have many serious thoughts in the first place and when I do I wanna keep them on lock down.
My head is a scary place to live in any way.
We shall see...