Hello Soloyoandme
  I haven't done any modeling yet, but I have started collecting software to make it easier.  If there is a specific piece of software you wish to do the modeling in, you may want to include that in your request so that the tutorials will better match the tools you have.  I have run across quite a few tutorials on making clothing, but I don't remember where I found them.  

I didn't find one with a quick search at ShareCG, but that might mean I need to work on my searching skills.  ShareCG has a whole section for tutorials.  The tab for tutorials is at the top of the screen.

I did a quick search at the Daz3D forum, and got 53 hits for "tutorial", "modeling", and "clothing".   http://forum.daz3d.com

I also did a quick search at FaerieWylde for "tutorial" and "clothing", and found 35 matches, including one specifically on Dynamic clothing.  http://www.faeriewylde.com

Any Poser or Daz Studio forum you regularly visit would be a good place to do a search.  I hope this helps.

                   -David