letter line under cursor

[AM-I-Human]

I started to use the keyboard and find difficult to see which letter i'm on.
it will be nice to have a wheel under the cursor or over the bar. this wheel will have the current letter line.

[MaethorNaur]

I'm not quite sure if I understood your request correctly. The current letter to be selected is "highlighted" (the letter which can be selected is bold and displayed in a square on the keyboard)

[EricDru]

The problem is that often the input finger hides the letters on the diagonal.
Can we buy a clear stylus?
This suggestion ( if I understand it correctly ) is to also put a preview of the letter in the same position where it is about to permanently appear.
It is where the eye naturally falls.