What to do when you've nothing to do?

Hi, I'm Nikk and I have unlimited internet, lot of free time and a never ending thirst of knowledge, but right now I've no idea what to do and I'm sure some of you might have been in the same situation too, so what you guys did? I've been in this situation before and I used to learn about HTML, CSS, JS, Go, Python, but now I want to do something else. Something fun.