Dave, while I don't have a 60c your post reminds me of when I first got my GarminV. I spent all of 2 minutes reading the instruction manual. I then spent the next few weeks just pushing buttons to find out what they do. I then read more of the manual to compliment the info I learned on my own. I think I have a handle on everything I want my GPS unit to do.
Good luck with the 60 and remember to just have fun with it before depending on it for serious (or not so serious) navigation.
Nixter