A question for you, Charlie: How will the date be ENTERED into this database? That is, who will be recording all the volunteers names, activities, etc?
If one person is going to be doing all of it--if you don't need a web page where each volunteer does it for himself/herself--then maybe you don't really need a database. Maybe just an Excel spreadsheet will be sufficient.
If you don't have experience creating integrated websites (that is database integrated with web server code), you may be biting off way more than you are ready to chew. Maybe a simple spreadsheet is a more practical solution. And even if it's not the best final solution, it might be used as an interim answer.
An optimist sees the glass as half full.
A pessimist sees the glass as half empty.
A realist drinks it no matter how much there is.