Danny makes some good points, there is no "One Size Fits All" solution to anything pedal steel, it is a very individual thing, although there are common obstacles which we overcome in our own ways.
I like to have a shoe with a soft sole as it gives me a better feel of what I am doing with the pedals. Getting used to twisting the left ankle one way or the other takes time and I found my ankle eventually loosened up as I played more. Finding a comfortable "off" position helps, I lightly rest the right side of my left foot on the B pedal and the left side of my left foot on the A pedal, being careful not to apply enough pressure to raise the tuning. The left side of the left foot is then free to press down on the A pedal when required, with the right side ready to press down on the B pedal. A common bend is pressing down on the B pedal then pressing down on the A pedal, having your left foot in the "ready" position helps to react quicker for a number of combinations.
Gwmpy makes a good point about lowering the pedals. I like to have my pedals as low as possible, I found that it works best for me when both the A & B pedal are at the same height when both pedals are pressed down, likewise B & C pedals. I set up the B pedal first, then set up A & C appropriately. In practice, (on my steel in any case), this leaves the A & C pedals slightly higher than the B pedal and this feels natural to me but maybe I have just got used to it over the years.
To reiterate Danny's advice, it all takes time to find what works best for you, a lot of patience and trial & error, but it eventually all starts to come together and all the pain and hard work turn into pure pleasure, maybe that's why it's so addictive
