hehe that foot rest is very common in manual cars, you better use it or you risk slowly grinding up your clutch.
The few times i have driven a automatic i have to pretend i have no left leg, CUZ dosing the break with the left foot dont work, well maybe in on the limit toe / heel style driving in a manual transmission.
Which i did sort of practice when i was a younger fool, even if my little German not that hot hatchback dident have a turbo that needed to be kept spooled up.
Probably also why no one liked to drive with me back then, even if i also back then had a perfect driving record.