There are so many places to start.
You don't need all the bells and whistles, you can start with something easy like a blogger site like Bill Miller uses. It's free, easy and will get you running in a few minutes
http://www.blogger.com
Check with your school, They may allow you space on their site.
Approach sponsors or other local businesses. This is an easy way to help the team. Anybody that does web design loves to teach and share. It may bring on a new sponsor.
If you are interested in the website award, follow the guidelines that FIRST publishes. It is a great place to get started.