I teach 18 year olds and up. When I started, I assumed that everyone would know basic things, like creating folders or copying and pasting with a mouse. I'm surprised how often I have to teach them computer basics.
I agree, it's helped my mental health and is helping me with other hobbies I've been meaning to pick up. Which is ridiculous, because I would subscribe to subreddits for those hobbies, but would never actually engage with them, then feel like a lazy dickhole.