Is there an optimal way to determine where you should be allocated in life?

To be specific I mean what kind of job or activity would suit the idiosyncrasies of my particular brain and body, 21 years old.

I am particularly naive and clueless about the real world and myself. I need guidance and someone to choose for me. Becoming some grunt in the military or something sounds like it's the best I can do, but I am also bad at cohering with teams and working communication into decision making. Please don't take anything I say too seriously, I don't know what I'm talking about or thinking about, I just need some structure in my life, I can't figure this out on my own.