Subscribe to magazines that you want to follow. In setting, change your homepage to 'subscribed' (or whatever it is named). Then only scroll your subscribed communities.
Or
next to the subscribe button, there is another button to block a magazine.
Personally I do both. I went on the magazine page, I subscribed to many small communities even if I'm not really interested in. And I block the big ones that are flooding the 'all' homepage (=reddit =redditmigration ....)