I think you are correct that not a lot of people here do their own maintenance. More people on E90Post and for sure on the M3FORUM.net E46 M3 site do. So, making the leap that the clutch actuation systems are likely similar on those cars to the one on yours, you could look for info on those boards and potentially ask questions over there. Here's a thread I found on M3FORUM.net that may be helpful:
http://www.m3forum.net/m3forum/showt...t=bleed+clutch.
Hope this helps. The only thing I've ever bled was the front brake on my motorcycles which was always a pain.