Resetting nintendo switch is going nowhere

If it's the PIN and you don't know it, the parental controls app on the phone shows it in its settings. And if the console's going to someone else, deregister it as your primary console on your Nintendo account before you wipe it.

Is it stopping at a PIN screen? If parental controls are on, it asks for that PIN before it lets you initialize, and that's where most resets stall. Turn parental controls off first, then System Settings > System > Formatting Options > Initialize Console. If you want to keep your saves, back them up to cloud first (needs Switch Online) or use the 'without deleting save data' option from recovery mode, which you get by holding both volume buttons while powering on.