Go for it as soon as possible, as long as tickets are available: Italian houses (and all opera houses of the world) plan their seasons years ahead and other than cancellations, don't count for any changes in a published program. Also, consider yourself lucky, since in Italy regular opera presentations, as a rule, stop from August to November (obviously, I'm not talking about summer festivals like Verona and others).

By the way, you're in for a small surprise in the overture (sinfonia in rossinian terms). As a matter of fact, at the end of the sinfonia of the opera which he later called a "Peccato di mia gioventù" (sin of my youth - he wrote when he was 21), Rossini noted in the manuscript "Dio ti salvi l’anima" (God save your soul), most probably anticipating the reaction of the Venitian music lovers where the opera was presented for the first time.

Enjoy it!