You have moved to a city for a project that you initially find totally boring and are prejudiced, grumble, are skeptical and reject many things. The longer you stay in the city, the more you recognize its qualities and become socially integrated. Suddenly you love everything and want to stay there.
Good empathy for the role is important. You should play a lot with your facial expressions, especially grumpy/skeptical ones. The commercial is structured like a mockumentary, so training as a voice actor is an advantage.