How to automatically sign in member roles with custom member registration

Hello dear people!

I’m starting with a brand new website and I want to make it possible to have a sign up button for my customer (which I already made)
And I also wanted a separate page so that the contant creators can sign up and get there own desktop so that only those people cab submit contant.

With the final result of giving a link to all the contant creators i want an that those afterword can submit there contant get it to my database and put that information into my website!

Hope there is a code for this or another way to automatically sign in member roles with custom member registration