port 22: Connection timed out

I have tried almost everything to get started with my Jetson Nano but can’t overcome this obstacle.
My computer is a PC which runs a windows10 and 64-bit OS

Are you trying to flash? Windows won’t work. Are you just trying to use Windows to network with the Jetson? That works, but Windows will require you to allow the USB device before the virtual wired network can function (that’s something you need to do at the Windows end). Sorry, I don’t know the details of how to tell Windows 10 to allow the USB network device.

Would anyone here know what is needed on Windows 10 to allow the USB virtual network?

If you have avahi setup ssh into Jetson from Windows 10 by using the hostname of the Jetson.

ssh username@hostname.local