With the default terminal you copy by selecting, like X11, and paste with right-click.

So select is select or copy, right click is open menu or paste, both depending on whether or not you're in the terminal. Control-C is also copy or kill, and iirc shift-control-c is nothing or copy.

There's a meta key on the keyboard, idk why they can't just do meta-c meta-v everywhere. Same in Ubuntu.