DCs? not sure what them are

... anything like DMs?
Regular trainers or plain work shoes i've found are the best for driving in (though i cant say i paid much attention til now).
Big boots or boot-style trainers are a bit of a liability even with fairly wide-spaced pedals, you keep hitting 2 at once til you learn to be ultra-careful (can be uncomfortable having to do that, too).
Barefoot.... uh... tried that once. The texture, size and resistance of the average car pedal makes it feel right painful. Well, the brake and clutch do anyway, and they're the ones that matter when it comes to safety.
Don't sweat it on the motorway, by the way. Once you get into the swing of it (and it won't take long, usually) it's easier and safer to deal with than town or country lane driving... just a matter of keeping the car positioned between the others and regulating the speed, at the most basic level. No curbs, tricky right turns, pulling out from a standstill, clutch balancing, any of that. You might not have to touch the gearlever or clutch at all for a couple hundred miles, or the brake - if you're lucky.