There are a lots of modelling tutorials. Try the Tuturial on top of you screen, you can also see Modelling Forum. But you should know what tools i Use,
War3model editor = use for creating material for skin, importing geosets, Creating animations,
MDLvis (Vertex Editor) = Moving parts, Creating animations and more.
Those tools are powerful for modelling. Just watch tutorials and models, I did that, and what have it made me now.