Even on Primal you can't follow anyone? On Primal when you create a new pair of key they also give you a bunch of people to follow selected through various active users.

Since you just started maybe creating a new one from scratch it's the easier solution (also if you dont have already paid one of the paid relays and connected to your actual npub)

P.s. check also this very old source list I made long ago

intuitiveguy.bevstr.com