Can't find a way to use shortcut other than caps lock to switch languages

I have a MacBook Air with Monterey OS. It looks like the only way to switch between languages is to use the Caps Lock. When I had a different OS, I used to be able to use any shortcut I wanted to, but I can't seem to do that with this OS for some reason.

I just hate using the Caps Lock to switch between languages and would like to use command+space instead (or anything other than the caps lock). When I go to Settings --> Keyboard --> keyboard or input sources, there is no "+" button for me to add or change additional shortcuts.

Would appreciate any help! thank you!