StackExchange is pretty friendly to beginners in my experience. I used to post straight-forward questions on math and stats on math SE and stats SE. I got answers within hours and sometimes minutes, and the answers were spot on.
People asking questions mostly wanted help, but most moderators thought they were curating some kind of question-answer form encyclopaedia. Very different perspectives.
Even inside SO each language and topic would have different standards. A C question would not be answered in the same way one about a JS framework would.
Stack Overflow was the "flagship" product of the Stack Exchange company, and if the company pivots to AI, I wonder what the future holds for the other Q&A sites on the SE network.