You might have grabbed the wrong iso. There are two ISOs for Ubuntu, one is desktop which comes with a desktop and the other is server which only comes with a text console.

You can install a desktop onto a server image if necessary, however I would recommend just using a desktop iso and don’t bother with adding on and setting up all the desktop software.

If you want to be able to select text, copy and paste, I just SSH from Windows Terminal or Mac iTerm2

Alternatively if it is a desktop iso then you might have accidentally installed a package that broke things or have gone a tty interface. There’s so many different possibilities it’s going to be hard to help more.

Kinda funny that rather than explaining how toilets work you try to compare it to circuits, which I’d take a guess and say that a majority of people don’t know how they work, lol.