is virtually the only command I used as a beginner.
But that said, you may install from the AUR using yay.
I found out previously just use yay. Don't do sudo yay. It's not necessary and not 100% of AUR packages are guaranteed to be clean: omitting sudo will keep them out of root.
Does internet work? You can check by running “ping archlinux.org” in a terminal, (Ctrl C to stop it). If you are connected to internet you could search for packages using the “pacman -Ss <e. g. chromium>”, and or install by using “sudo pacman -S <name>”
It’s possible you may be specifying the wrong device? Try iwctl, and then “device list” to see other options. I always seem to have two or three, with only one working. More info here: https://wiki.archlinux.org/title/Iwd#iwctl