Another fan of the fan oven here! Especially the 2 door version like yours. One thing to watch out for - when you open the oven door after you've used it, STEP BACK! You will be hit by a blast of hot air!
The top bit, the grill, can indeed be used as an oven but unless you really need to, not that worth it (I found things burned a lot from the top as it's so small). But I do like to do oven chips or cheese on toast in them. That sort of thing. Oh, I did Spanish tortillas in them as well. And as vnice says, good for keeping things warm on Thanksgiving!
Agree with all the other suggestions of lower temps and times. For your first effort, just watch watch watch that way you won't risk burning it!
Let us know how it goes!