I started following people I found elsewhere, then followed people they boosted until my feed had enough volume. Since I mostly consume content and don't post much, that has been working for me. It does take some figuring out and blocking people (like some on this thread) who'll act like you're not supposed to be there if it isn't all obvious to you (it really isn't to anyone). If you like both lemmy and twitter (X) it might be worth giving masto another shot.