You just tap the follow button on their profile. I see you following zero people. Maybe your profile is broken. There's an emergency fix section in settings that you can visit to see if that helps.
Discussion
I click the follow button, then it changes to “following…” and if I leave and come back I’m unfollowing them. I’ve waited for like 5 minutes and it never changes from “following…” but for some reason it just doesn’t stay. I’m connected to like the 5 relays they start you with, I can post and see stuff and people can follow me. I will check that out thanks!