Create Classes of Users/Pages Q 1

Hello,

This question comes in two parts (in two separate posts). Here’s the first part:

How can I create classes of users and respective pages?

Let’s say everyone who signs up starts in class A and can see all pages of class A.

Some users may sign up to be part of class B. I then change their status from A to B, and they can then see all pages class A or B.

We continue this process.

I’d like to define user types/classes: A, B, C, …

And I’d like to make some pages available to A and above …, some only available to B and above …, etc.

Can anyone offer some guidance for that?

Thanks.

Mike