How to send registration links to a specific user group of a WP site?

Question

WordPress

There are 3 categories of members (roles) on a WP site with different access to site pages.
The task is to provide restriction of access to pages.
1) It is required to hide content from unregistered users
2) is it possible to make a link to register a WP user immediately to a specific group (role) on the site (with access rights to content)
Perhaps WP-Recall + something else will solve the problem, especially the second one.
- How to make links for registration in a user group on the WP site (role)?