Camera Controls - Top Down, Chase Camera and Drive Camera (which is what I actually like most as it lets me use my keyboard for controls)
Aside from controls, Bim will explain to you the benefits of the right click button which will indicate a set of actions that you can do for yourself or another character in game. This will also give you access to skills, feats and other abilities.
Introduction of the Quickbar is also being explained here. Note that the Quickbar is one of the essential tools in playing NWN especially when you're in the middle of combat so don't neglect them. Simply drag items, or skills over to a slot to be able to use them in the QuickBar Function. The SHIFT and CTRL keys also lets you add additional items to your quick bar.
The Character Sheet (shortcut key "C") will also be essential as it will display your feats, skills and abilities.
Another key feature is the Pause and Play ability of NWN. This means that you can pause your game at anytime (spacebar function) and plan out what you're going to do next (cast a spell, heal, attack etc.) Meaning you don't have to stress yourself out too much!
Finally, learn to Rest up! ("R" or the eye image on your menu)This heals your character and other characters in your party as well as taking out spell casts on your party without having to use skills or any potions. It's a very important part of the game and shouldn't be taken lightly.