Yes, that's a problem, but I'm used to a stick, and that issue was quickly resolved after an hour or two of practicing. One hint - use your ankle muscles, not calf to apply pressure with a left leg. If you don't have a low traffic road to practice, you can use go-kart for that too.
I'm not sure what you mean, but I noticed back when I was driving stick one of the things I do with my left foot (and I hate how I misspoke and derailed stuff) was lifted my heel from the floor of the car.
With my right foot on the gas and on the brakes I can just pivot my ankle to control the pedal with my heel resting on the floor, but with the clutch you typically have to quickly press it in completely, but then slowly and smoothly release it. Which is easier to do with your heel in the air.
