This is yet another question on the subject, the others were closed, but without providing enough help to get me going.
So, when I go to Language and Region settings I can install a яверты Russian phonetic keyboard, i.e. a Russian keyboard where qwerty maps to яверты. This mapping never made much sense to me, I would like to use a keyboard where qwerty maps to яшерты.
I found only scarce pieces of information on the web on how to do it and all implied some level of prior knowledge. I have none. I am comfortable with the command line, though.
Can anyone provide a detailed guide on how this can be achieved or a link to such a guide? Please, assume zero knowledge on the subject of mapping keyboards in linux.