If you want to start blogging quickly try these sites:
Blogger: Create your Blog Now -- FREE <- I believe they have added adsense already
LiveJournal.com - Start a Free Blog / Journal Today WordPress.com » Get a Free Blog Here
But if you want to really control your site you have to learn HTML at the very least then move on to scripting (Javascript, PHP, CSS, etc.).
Use this highly-rated and FREE software tool for your personal blog:
Blog Tool and Weblog Platform