Welcome to the forum! Your first stop should be the Help button at the top right of the screen. Then click on item number 3, About the software. All is explained here. Read it all carefully and you'll soon know your way around your new software :) Have fun!
Edit: I just read this item again and it is in need of updating to current software capabilities. I'm sure the Totem team will have it bang up to date asap :) However, most of the functionality is still the same. The software has changed many times over the past year or so, in particular over the last 2 or 3 months. It is now far more powerful and we users have so much more control over what we can do with it.
If anyone has more questions about functionality of the software, try a search first (At the top of most forum pages) as your questions have probably already been answered before. Failing that, feel free to ask for help in either this section, or the bugs and fixes section. Somebody will help you out but please be patient :)
Btw, I'm NOT a mod and will never be one ;) I just like to help if I can :)