I had to drive using only my left leg for about four weeks. Alot of your success will depend on your vehicle. I drove a Dodge Neon and an Isuzu Amigo. The Neon was the harder of the two to drive like this.
Bump the idle speed up a couple of hundred RPM. It's not forever and it will make it much easier. You are going to operate all three pedals with your left foot (one at time unless you are exceptionally talented). Flat ground is a piece of cake. Roll up in neutral, stand on the break. At the light change, push the clutch in, select a gear and ease the clutch out. This is where the increased idle speed is very beneficial.
Hills are a little tricky. Make good friends with your parking break. On a hill, roll up in a low gear. At the stopping point, pull the hand brake, then push the clutch in when the brake begins to drag the engine down. You should be stopped with the clutch in, in gear, parking brake applied. Reasonably safe. If you're waiting for a light, pop it in neutral and stand on the foot brake (so your lamps operate). If you're not confident with that and it's daylight, flip on your headlamps so that at least your running lights at the rear pop on and warn the guy behind you.
To take off, get off the foot brake, push in the clutch, get the low gear and (depending on the torque you have and steepness of the hill) either ease it out while simultaneously releasing the hand brake or do some quick hand brake release while swapping between the clutch and the throttle. Hills are tough, think about avoiding them if you can. Especially the steep ones. They are do-able though.
I had to drive in traffic every day. Yes, I did stall out a few times but it turns out that you can't actually die of embarassment. Good thing or most of us would have never survived high school!
angela