That's when you use the Nintendo Switch Parental Controls app, with its charming video to introduce it. https://www.youtube.com/watch?v=03bAayBtcb0
Plus, it's nice to play in the lounge with all the family. I'm glad to hear you have the previous consoles and can do so!
We could get it and not let them take it anywhere, but we moved to Steam on Linux pretty much.