The first time I opened vim (it was probably just vi at the time) I couldn’t exit it and had to shut down the computer by holding down the power button (!) to regain control of the machine. It took a while before I tried it again. Ultimately nano felt like it was for kids and emacs felt like an even worse option than vi so I memorized a few sequences, eg :q!, :wq, how to enter the insert mode and how to exit it and simple edit commands like dd and x and this gave me enough proficiency to get by.
Most all the terminal commands require prior study before they become easy to use. Its because Unix was created by engineers rather than by ui/ux design professionals.