My left ankle is partially fused. I have very limited movement of that ankle. I fly a RV-6. I find that when landing I have my heals on the floor and my legs control the rudder. When I need to brake I move my leg/foot higher where contact with the top of the rudder petal (Top of Brake) is located. Applied pressure then activates the brakes. It is very natural for me and I don't have to think about it.
When I shattered my ankle I was in the middle of building my tail dragger. I freaked out that I might have a problem with flying it.
I would suggest flying with an instructor who can save a landing if your feet go astray. You will naturally figure it out in quick order.