Hi, welcome! 👋
One good way to find people is to browse relevant hashtags on major instances. For example, looking for the hashtag brewing on mastodon.social has a number of interesting accounts:
Just swap the word "brewing" for whatever you want to look for.
There's also Trunk which lists people who have opted into the directory. It's manually maintained so some of these may be out of date, but it can be a good starting point:
This is a brand new server run by the main developers of the project as a spin-off of mastodon.social It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!