Sorry if this is out of place, but, if you are just starting out with your modelling 'career', I would suggest using a different software. It's always up to the artist which software is best for them and which offers the feature set that they prefer. However, that being said, I would always recommend Blender to new artists that are learning how to model for game development.
It enables you to model, texture, animate, sculpt, export to a large number of formats (including Direct X).
If you are interested, I have started a series of tutorials; that takes absolute beginners from beginning to end of the modelling process.
Here is the thread for the tutorials.
Cheers
Jay.