How to allow users to create a "home page", and loop them on the front page.

Hi!

How could I achieve this type of functionality:
– Anyone can sign up and create a new user
– There is one post/page/CPT (whatever is the best solution) automatically created and made as their homepage. Users can only edit this one page.
– These posts/pages are shown on the homepage of the entire network, can be searched from the home page and navigated using tags.

Thank you!