My experience, in short: I went to grad school by default, and without a clear goal. It wasn’t a complete waste, as I made friends and grew up and traveled and learned during that time, and the degree conferred “highly-qualified” status for teaching, but I think tradeschool or farming or something involving a healthier mix of physical and mental exercise would have been a better course, supplemented with time at the library. Whatever you choose may not be perfect, and that’s okay. Good luck!