Redirect by registration field input

I have two user types, a general user, and a higher tier user. I want to have a checkbox when registering for a general user asking if a user wishes to upgrade to the higher tier. If the checkbox is clicked I want the user to be redirected upon registration submission to be taken to a new registration form where they can then apply for a higher tier user account which will then be approved by an admin. The individual will have two separate accounts, a general user for using the vast majority of the site as per normal and the higher tier account which will have access to specific pages.

Any suggestions on how to do this? I was looking at the hooks for after completion of the registration but not really sure if I could use that to see if the checkbox value is checked and redirect as required. I am very new to WordPress and my knowledge is at a beginner level.