I didn't read the documentation so I didn't know you weren't supposed to use sudo with yay.
-Ss can be added to pacman to search for packages. Pretty useful if you don't want to DuckDuckGo them every time.
As for applications one neat one I don't see recommended very often is xkill. You can use it to kill applications kind of like you would with the task manager in Windows. htop is probably a closer comparison to the task manager in general though.
There are a lot of Arch-based distros that are incredibly easy to install if you want a very easy setup process that doesn't involve a lot of terminal work.