Voglia means desire, wish, urge, or very often feeling like doing something.
In everyday Italian, avere voglia di + infinitive is a very common way to say to feel like doing something:
So in this sentence, voglia is not just a formal desire; it is the ordinary idea of feeling like it.
Because the pattern is:
avere voglia di + infinitive
So:
The preposition di links voglia with the action that follows.
Yes. Italian word order is flexible.
These are all possible, though they may sound slightly different in emphasis:
Putting per ora at the beginning gives the time frame first, which is very natural here. It tells the listener immediately: as things stand right now...