Is this what I need to do? I have a website set up

Is this what I need to do?
I have a website set up on Customizer. Menu button Merchants, I need a "sign up Acct." form with choices of a few templates they want to choose from.
I'm trying to make three themes into templates. Can I make my themes from Artisteer? Then I would make three new sites. take those url's and put them in "new blog template" blog path?