Auto enter current date when a field is updated?

Hello, I am wondering if there's a way to have a date field self populate with the current date whenever I make changes in a field. I have a database with a 'Notes' section, and it would be nice to know how old the info is. It's important that it's tied to a specific field as opposed to the record itself.

I don't have lot of experience with scripting, so doing this is currently outside of my abilities. If this is not possible, does anyone have any suggestions or workarounds? Thanks in advance!