As for the zoom idea, if it is only about bad eye sight, you can simply scale the whole interface permanently to the desired size. Reiner even made a video on this. – https://www.youtube.com/watch?v=oCTKR179WNQ
I also find using only the icons a bit confusing, since there are so many, but you can also have the text permanently enabled next to them, which gives the best of both worlds, easy location of the functions you know and easy finding of the functions you don´t know so well yet.