You need to take a step back an understand what and how it all works.
FWIW I think you are just making work for yourself, especially with the lack of experience with Access.
Your next struggle is going to be updating the Inventory from the one you made.?
I believe you should just use the template. ignore irrevelant fields unless they insist on having a vlaue. Even then you could amend the DB so they do not.
Good luck with it anyway.