I guess I'm the "something else entirely" vote. If it's mostly for internal use, I would shy away on build on a platform stuff, and find a "form builder" type app with web server capability or a web service. Google sheets feels a little light for this purpose, but likely could be done at some maintenance cost as your number of forms grows.

The first hit in my search was zoho creator or Airtable (but I know nothing about either) - I was looking along the lines of something like Filemaker for the web. And just to keep growth in mind, be sure to have a way to export the database and form/field content. That way you can keep the option for a more custom build scenario later.

Edit: added a google sheets comment.