Help my girlfriend

Hello everyone, recently I bought an Anbernic RG40XX V for my girlfriend who is not a very big gamer but who, seeing me playing Tarzan PS1, remembered that she loved this game as a child and wanted to be able to play it replay. The problem being that she has a lot of trouble finding which button to press because when the game tells her to click on square for example, she doesn't have the ease that we video game fans have in knowing the position of the button. these keys even if they are not marked on the controller.

I am therefore looking for a solution that would allow him to have the PlayStation buttons visually available on his console. I know it is possible to change the buttons but I am afraid that eventually she will end up wanting to play a Nintendo game and that she will be lost again. I thought about stickers to put on the keys but I don't know if any of you have better suggestions?

Thank you all in advance for it!