Maybe you're right. If Inter Milan focuses too much on their defense then this will only make Man City players more free to build attacks. But Inter Milan, who are also known for their counter-attacks which are always dangerous, cannot be underestimated either. well in the end I still favored Man City. and have the same hope as you, namely I hope Man City lifts the UCL trophy this season.
And about the meeting of the two teams, I think there are not many meetings between the two. I don't even remember them ever having competed in an official competition. It's just that according to the news I read the last time they met was in a friendly match in 2010 or 2011. So you are right that this match will be more difficult to predict because this will mean their first meeting in an official competition.
Manchester City and Inter have their strengths and weaknesses and both will explore each other's weaknesses to find space to score goals. I'm sure Manchester City as an individual player and game strategy will have no problem beating Inter, but things like luck can also help Inter win titles over the favorites.
The strategy that Pep Guardiola has and the individual quality of Manchester City's players is basically their advantage, so this is something that makes Inter's players' confidence not as good as expected when they played against Manchester City.