You can try what I have, which arrow keys mapped to P, L, ;, and ', which will allow you to use the same arrow key muscle memory with the only addition being holding your pinky down on the Fn key next to RShift.

Topre doesn't use springs in the same way that discrete switches do. Your reds have a slider that bottoms out against the bottom housing of the switch. With Topre, you're pushing down against a rubber dome that sits directly on top of the PCB.