Blogger vs WordPress Blog

Hi, I am new to wordpress, and still figuring things out. I have been experimenting with different themes, and have been changing settings etc. to the point where I have messed it up for myself. I would like to somehow 'reset' all the themes, and erase all content. I would love to start over with a fresh website, just like it was before I started messing with it. I could start over with a new blog entirely, but I want to keep my address. If someone could help me with this, it would be much appreciated!

Thanks, Zack.

The blog I need help with is magnifylavi.wordpress.com.