I didn’t want my feed to be an endless stream of news or other languages. So first I joined a smaller server, with a topic I care about.
Then I followed a few journalists, and followed tags I care about like cycling, my hometown, tech news relevant to me, and TV shows.
Lastly after I had that base of content… I went looking for people. When someone posts something I like, I check their other posts… do I like those too? If he’s then I look at who they follow. Big accounts usually don’t follow a lot of others. This is endless but really gave me a consistent group of people who I care what they think and say.
Not easy but worth the time over the course of a week or two.
Also I watched the #followfriday tag where people lost accounts they follow and why.
Also, look at the top accounts lists that exist. Threads accounts have millions of followers so it’s a good bet it’ll be good.