Yeah what Samecat said! Just write about what you’re passionate about and you will find people and they will find you. Don’t just like, respond to others notes and you will find that people are ready to engage in an open and transparent way free from manipulation. Most of us are here for this reason.
You look g2g tbh. Follow people now, and post whatever you’re into! Your account will grow and you’ll find new folks!
Relay management is something you’ll pick up on over time. I wrote a short article on it here: https://thesamecat.io/blog/how-many-relays-should-i-have
You can also check out the global feed, and find people there!