Can't connect to WIFI, 2 different adapters

I have two different adapters: Broadcom bcm43228 (b43) and Netis wf2190 (RTL8812AU).

I can’t even get Broadcom to run, at startup linux tells me to go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the firmware but the site is down and I don’t know what to do. Can anybody explain it to me?

The second adapter is a little bit weirder. I’ve managed to install RTL8812AU driver and I can even see available networks but I can’t connect to my dorm’s wifi. I chose WPA/WPA 2 Enterprise, PEAP, MSCHAPv2 and my login and password (certificate is not needed). On Windows 10 it works but on Clear Linux it keeps asking me for my password. Apparently a workaround is to edit the network file in /etc/NetworkManager/system-connections but the file is empty when I open it.

Please help me, I’m a total newbie.

This should work. Without more info we can’t really do much for you - check the output of sudo journalctl and maybe figure out what the correct settings for your dorm is?