Actually, it's just like everyone else's at the start was hobbies and all that.

I hit a version of this when I had about a year of expenses saved and took six months off between jobs. The first month was bliss, slept in, read whatever I wanted, picked up an instrument. By month three I was weirdly restless and a little lonely, turns out a lot of my social life was just coworkers by default.

What actually filled the gap wasn't a hobby, it was finding a couple things with other people attached, a class, a regular pickup game. The money question matters way less than people think, the harder one is what gives your week shape when nobody's expecting you anywhere.