C = Autorun
D = Strafe left
F = Strafe Right
Right mouse = Turn
Both mouse = Stop walking/start walking
I find it a lot better to use autorun over move forward, because it gives you a lot of freedom (1 finger).
Of course, you have to get used to that, since they work in a very different way. Autorun may seem complicated, but if you stick with it for a day or two you'll get it.