3. I'm working on finding an usb to ethernet adapter to connect it to my computer. Do I keep my computer connected to the switch with the USB to C cable when I connect it with ethernet cable or unplug it and connect it with ethernet cable only? 

with the interfaces where are connected the Access point and the ISP router one by one,I want to check the uptime of each. - My computer skills are good enough to  follow step by step instructions (preferably with pictures). I don't understand how to check the uptime and what that means.

4. I tried all the combinations it doesn't let me in. if the Lennar technician who came to our house 2 years ago changed it - we don't remember the new password. Is there a way to change password? When I click on forgot password, it says "password recovery is disabled".