Get the map and compass book and disregard any GPS stuff until you have mastered the basics. Kjellstrom's book is outstanding.

You need to be comfortable with a map, knowing what the symbols and markings mean, how to terrain associate, and how to navigate with a compass.

If you can land navigate without a GPS, having one is great and a timesaver. If you can't navigate without a GPS, once the batteries die you are pretty well hosed.