I wish I could travel back in time and squeeze you and hug you and tell you all about the amazing adventures you're going to have. I know things are very uncertain right now. You're about to graduate from college, but beyond that you have no real plan. Real life seems both light years away and scarily fast-approaching.
Find something that makes you feel like the world makes sense. Personally, if I don't get up, get laid, get down on a dance floor, read a good book, write a poem, listen to a mind-blowing record or have a soul-shaking, satisfying conversation at least once a week, the world doesn't make sense to me and I am unmoored.
As with coding and management and matters of finance and marketing, relationships have a learning curve. You learn the basics of "relationshiptiva" (yes, I made up that word): How to deal with sexual etiquette, mundane everyday things, scheduling, and appropriate meetings with close friends, and some equitable plan for who's supposed to pay for dinner or wash the dishes this time. These are basics. And if you're learning them in your thirties, it's going to be much harder.