It comes with time :) When I initially moved away from Twitter and Mastodon, I had the same feeling. Not everyone hugs the global feed (when I do it on Snort, my PC fans go brrrr xD) so being "discovered" is not that common. Just give it time, you'll be seen eventually. Unlike Twitter, there is no algorythmn that might recommend you to people - things are much more "organic" on Nostr in my experience.
Discussion
No, I don't really care about being "discovered", more just if my follows are actually seeing what I post 😁😁
It's probably evident that I'm not losing sleep over it, lol