How to rotate and move the camera when a specific key is pressed?

This was very helpful as I’m trying to make a dungeon crawler on a grid myself! Few more things I’d like to able to do tho:

How do I increase the size of a single step? I tried messing with the timeline duration and final value but so far, my character always takes 100 unit steps.

I also want to set it up such that my character will keep stepping while the button is held down. Anyone know how to arrange that?