Gallienus, what you miss is that you need a ton of experience and knowledge for your goals here. And it needs time to learn that missing bits. Lots of time. That's why it is no good idea to start with something this complex as you have mentioned. That game project is a bit too advanced for the beginning. It is also no good idea to start with a whole character when you are new to 3D modeling at all. That is a bit too advanced for the beginning.

Try it and you will know what i mean

First learn the software and the basics. Then go on with something more complex. And this counts for both, trueSpace and 3D Gamestudio