Armin,
This is the first time I hear about someone coming from a digital background and moving to film. If you are not pulling our legs then perhaps film is not dead after all! As it has already been mentioned, you will need a film scanner. I bought my Nikon Super Coolscan 4000 about 4 years ago and I am very pleased with it. There is now a newer version. Starting with slides is a good idea. Coming from a traditional film background I had to teach myself how to use the scanner along with PS, it was not easy but it has paid off. Here's a picture of my M7 I just posted this morning:
http://www.leica-camera-user.com/other/4090-lucia.html
Congratulations on your new M7.
Cheers,
Wilfredo+
Benitez-Rivera Photography