Kathy,
I just got my "Fitbit One" about four days ago, but I will be glad to try and help you. Which model "fitbit" do you have? The first thing is to charge the unit in a USB port which sounds like you figured that out. I think the single piece of paper that came with mine said to go to "Fitbit.com" so do that next. When you get to the website, you will download the software to your PC/ phone or whatever device your using just follow the screen. After answering a couple questions, you then start wearing your fitbit. On mine syncing occurs automatically, oh also since mine is connecting to my PC, I have a separate really tiny dongle that stays plugged into one of my usb ports, I guess thats how it automatically syncs. You can also force a sync by selecting sync now, I usually do that after I wake up in the morning because besides exercise, I am using my "Fitbit" as a sleep monitor too. I hope this helps, and makes sense. I know the fitbit help, was not much help for me but once I figured it out it worked great.
Let me know if I can be of any other help.
Rock n roll ! 
