Theres no better practice than just going in there and experimenting.
But, before you can do that you need to learn the User interface. I recommend this book:
Introducing Maya: 3D For beginners.
It is regularly updated with the latest versions of Maya, and can most time be found at your local library. This is a great book for teaching you the basics concepts of 3D, and it's uses, all the way through Modeling in Polys, Nurbs, Sub-Ds, to Rigging, animation, texturing, rendering, Plus loads of other tips and tricks.
Once you've followed all the Mini lessons in this book. You'll have the knowledge to interact with the UI and also have the know how, to achieve the results desired.
Plus is you want to purchase a copy it's relatively inexpensive, about $35
Have fun, and happy learning
www.stevenegan-cgi.com
"Your weapons are no match for ours! People of Mars, surrender!"
"Um, this isn't Mars. This is Earth."
"Earth? Earth-with-nuclear-weapons Earth?"
"Yes."
[long pause] "Friend!!"