I've been shaving for years with a Mach 3 and an Andis T line. Now I know it's incredibly different from a DE safety razor, but would it be absolute ridiculous for me to go straight to the 39c? I do not want to go through all the trial and error and study; from what I've read, this is the razor to have. I shave my head and face quite often. So is it impossible for me to graduate straight to this razor without losing an ear or significant blood?