I had a little trouble with mine, also. The interface with these things takes a little getting used to. I got started just fine, using the same directions as the others just listed. But I stumbles a bit when it came to the waypoint entry. I finally just used the book, practiced, found my 1st cache, practiced more, and so on. To enter coordinates, it's a combination of selecting the correct character from the "box" (highlight it by movin the black box over the character) then press down on the click stick. On the same table as the letters, there are numbers and "navigation" arrows < and > for example to move the cursor to the correct entry position. Also, you will see "space" and other text commands you can select. But it all starts by pushing down on the stick (you will see the man holding a flag). Then you use the stick to move the highlight to the first entry field, either the waypoint name, or the description (waypoint, attraction, etc.). Once you are "on top" of the correct field (first coordinate, for example) pres down and the text selection box appears (see directions above). When you are done with all fields and happy with your what you've entered, then move the highlight to "goto" box to begin navigation. You will make mistakes, but guess what? You can delete waypoints all day long! And then start over.
If you need to speak in person, please PM me. Do you have the owner's manual? Let me know. Good luck and welcome to the game. I just logged my 6th (only) today.