Website Changes Made Easy
Hey,
There are a couple of methods available for you.
1. I personally love Joomla, it is a great way to edit content, you will need hosting that has Linux/MySQL capabilities.
2. Something else you can do is check with your web host for a possible Fantastico app where you can just click a button and it is installed instantly...this includes several content management systems, websites in HTML, blogs and more.
3. Mentioning blogs above, wordpress is great also.
Now many of these opensource apps have free templates with them as well, you can stay updated.