Maryrrf,
The site looks good as it is. The pages are simple, uncluttered and uniform throughout the site. What sorts of changes would you want to make?

If you are only maintaining the site, you should be able to open the coding for a page, using whatever maintenance tools the host provides, change the text that needs updating and save the new version of the page without needing any fancy software, or a knowledge of html or javascript.

rags