Basically, I’d like to make desktop mode look and feel a little more like MacOS, and this app is kind of essential. Unfortunately I don’t know anything about what’s happening when it doesn’t install. I’ve set a sudo password, I’ve disabled read-only, I’ve initialized the pacman keys (whatever that means), now it says “unknown trust”…

Is there a straightforward tutorial somewhere on how to do something like this for an absolute beginner? I assumed changing the appearance and layout of my desktop should have been an easy and harmless first step for a Linux noob to try, but I already feel like I’m just smashing my head up against a wall.

Any help would be greatly appreciated.