You just need to put yourself around people as much as possible.
If your circumstances are that it isn't possible, you shouldn't beat yourself up about it. You perhaps could then make it your goal to relocate or put yourself in a position where you can be around people.
Recently I've been getting into making digital art and reading books. Though I haven't done much of either yet. These are new hobbies that I just discovered my enjoyment of and I'm just getting into them for the first time.
Sometimes libraries have book clubs, where people regularly meet up to - chapter by chapter or book by book - discuss the book. Those can be amazing communities. And you immediately share something meaningul (the book). Maybe see if your local library has one?