Welcome! Explore, comment, when you find people you really appreciate, check out ones they follow. You are your own algorithm, so you get to build your feed and discover great ones along the way. I've seen @Contra and @Stacking Functions intentionally get people sharing less well-known ones they appreciate - looking through those is great. And there are follow packs with people listed for different interests, and hashtags help search by topic.
If you're friendly and willing to see what you have to offer, I think you'll find it a great place to be!