Want to be able to sign up students on web

I want to be able to have students go to my website, go to a specific page, and sign up for classes.  I want them to be able to put in their name address, class, etc.  I would like it to go do a google sheet doc so that I can access all of the information from my google sheet without then seeing the information on the google sheet, to keep information private.  I would also like it time stamped as to when they signed up.  

I had some one doing it for me, who is no longer available, so I have no idea how to proceed.  I don't even know what category of help to read, as I have no idea what it is even called.  

Thank you

It sounds like you need to use a form block with Google Sheets selected as the storage option.

https://support.squarespace.com/hc/en-us/articles/205814638-Managing-form-and-newsletter-storage