Hmm, now you are giving me bad conscience. You are right, a fast startup tutorial for beginners is needed. It would need to take up,

1. How to make and texture cloth in Marvelous Designer

2. How to adjust the resulting UVmap in UVmapper

3. The right scale for export and import between MD, Poser and C4d

4. The pro and con of autogroup editor vs obj2cr2.

5. How to fix the impossible tight space between M4 legs.

6. How to retop an existing model and get a head start.

7. How to refine the texture in Bodypaint.

Nothing you can not learn in half a day, if you already know C4D. Of course that will not make you into a merchant. :) But you will have your own clothes.