well, I'm not exactly a prof eather. Everyone have to begin somewhere.
You probably know for this site, but if you don't, check it out:
www.learning-maya.com
Look at the modelling section , and check out every tut you can.
Also, what I found out pretty helpfull is to watch other people how are they progressing with their model, when they are making one.

Take your time, these are not thing that you can learn over night.
Good luck!