On threads, whatever you want, literally whatever. Even I randomly talk about things like my blood pressure or that I'm making yogurt.
If it's for articles, there is a community called LeoFinance that is for finance related content.
And on the community sections you can scroll and see that there are communities for everything: food, photography, music, gaming, cars, sports, etc
wow, this is helpful. Thank you so much. I from Africa, the-african-man sends your greetings "Ndewo" meaning thank you.