I want to start a blog but i don't know any websites? Just for writing a diary and such. Help?

Unless you want to tell the entire wired world what you had for breakfast and who you have a crush on (a celebrity or a kid in your class), a private journal using Word software or a paper book would answer. It saves the trouble from bullies, confidence people, and people who will check the Internet for information about you (Suppose you had written something "clever but inappropriate" and a prospective employer finds it on a search under your name.)

I don't blog so I can't recommend, but use Google or another search engine to search for "blog sites" or "list of blogging sites" or "blog sites for beginners"

Google lets you do that for free.

If you're just writing a diary then buy a journal and write in that.

A blog would be out there for the world to see. Not many at first, but still out there. If that's what your goal is then you can try sites like Wordpress or Blogger. I prefer Wordpress. It's easier to use and doesn't look so cheap.

Yes. Your very first entry could be about "not knowing any websites" and asking for help on Yahoo Answers. Fascinating stuff.

Blogger.com
Livejournal.com
or any of the hundreds of other free blog sites.