If you are more of a graphic designer than a programmer, you will want to be familiar with the following technologies for your page:
databases (for this, MySQL is sufficient and most widely supported)
You have mentioned that you are proficient with HTML, so all you need to do is process the submission information, and save it in the database. Then you grab the information from the database and add it into the HTML web page.
Just jump in-- find some sample scripts, and use the manuals.