This algorithm works well for fedi or Twitter:
1) First pick a handful of interesting looking accounts from the local feed. Check their recent posting history. If it looks interesting, informative and/or funny, follow them.
2) Now you have your personal feed, where you see those accounts interact (repost, reply) with other accounts. Check who they repost and what threads they reply to. Check (like in #1) and potentially follow those accounts.
3) Posts stuff you like, or consider important, and engage in conversation with accounts you follow. See who likes your posts or follows you. They are likely to be people you could have fun with, so follow those whose history "checks out".
4) Some people will follow you. Most of them will be cool, but watch out for potentially malicious interactions. You don't have an obligation to accept a follow, or to follow back.
5) Don't fedpost and don't dox yourself. Are you selling propane and propane accessories in the midwest? Hint at being a merchant mariner out of LA, or something.