After registration make user see his unique page ?

Hi there, long time wordpress user here… I have built webshops, news portals etc etc with wordpress but this project I am working on requires something else I am not yet familiar with.

I want when I create profiles for people who want to join my site to be able to see one unique page when they log in… That page should be visible only to them and no other user or guest…
The page will show some sensitive information ( pawn shop management and pawn status) and I would love to get a foolproof solution going. So when a person pawns some thing, we create a profile for them and now what to do ? The page would show how much they owe their status and instructions to make payments ( I have the generic page all set up) how would i get the user to see only one page after logging in and so that the other users can’t see the page but just their own ?
Something like tracking progress page…
I really have no idea how to make it work.

All help would be greatly appreciated !