Left foot - It'd be nice to keep both hands available to work all the vehicle'* controls as normal, and you have a good leg still so why not use it if you can? The biggest concern would be mixing them up and accidentally give it gas when you need to stop Once you're used to it though, the left foot is the way to go IMO!
Left foot pedals for sure, I've driven with my left foot before, without having the pedals moved. I always do it when I'm late for school and have to tie my shoes. Its not really hard to learn, took me like 2-3 days to drive normal
With hand controls I think you'd be putting out too much work for your hands, and you can't do the same things every other drive can do while they drive like roll down the windows, talk on the phone, press buttons, point, hold stuff, etc.