/u/hopesthoughts on Looking for: a website I can ask tech questions, but isn’t so serious.

Fora are still a thing. Perhaps a tech help forum would work for you? https://techguy.org/ https://www.computerhope.com/forum/ You could also use https://ask.metafilter.com/, but you have to register for Metafilter, and I'm not sure if they're taking registrations at this point.