For the first one - Disconnect that university account. Restart the computer. That alone might address the issue.
If not, please provide the information.
For the second one, after you run the command, it should return your username and SID. I need to see the SID, it should look similar to this:
For the third one, you need to click on the arrow for each folder on the left to expand it to find your next folder using this path
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PasswordLess\Device