Wow, it sounds like you have an absolutely beautiful home!!

I won't pretend to be an expert (I'm a novice as well), but in such hot and dry temperatures outdoors, you'll have to be certain to water it well. I'm sure others will come by and give you better help!

Caio Pizzano!

Hmm, interesting, because it's generally a tree that does like to dry out a bit in between waterings, but as yours is probably fairly small, I'd be careful about introducing it to 'outside' (only morning and late afternoon for a week or so, then full time), and do watch for drying out very carefully. I'd also put a white tile or something reflective against the pot itself to keep it and the roots cool. You might consider keeping it inside, depending on how things go. Any plants to ship your olives (and trees) over here soon :-)?