Start learning a musical instrument, my friend. If you already play one, then learn a new one. It will bring you pure joy.
I started learning classical guitar a year ago.
It's challenging but really nice.
This, 100 %.
What about photography? Lots of people are (re)discovering the fun of analogue/film photography now and there are plenty of usable cameras on ebay. It gets you out of the house and there are often relevant clubs where you can make friends.
LSD or shrooms
I would like to find out how to buy them in my country (are illegal and in Romania)
Copious amounts of weed.
Fun story: I had a friend who secretly grew them but he got caught and interrogate until the point of telling the truth where we were growing it (in the middle of nowhere on a private land)