Let's see if things will work out as you said; if not, Arsenal winning against PSG at home is going to be a difficult thing to happen, although it's football, and I’m also hoping to see that happen. Just that I’m curious because we already saw what happened at Arsenal's home when PSG came; they failed to utilise the advantage of being at home to win against PSG.
That’s why I’m wondering how difficult the second leg will be for them. You are right; since they won against Real Madrid, they have confidence. Instead of using the same energy for PSG, they failed because, obviously, things did not go as they played against Real Madrid.
Only if PSG player got red card, there's a chance for Arsenal to beat PSG. If they're equal, they both playing with 11 players, they will not able to beat PSG. Donnarumma was the problem for Arsenal, he will available again in the second leg.
Arsenal played not that bad in the first leg, they just unlucky for not able to score from many chances they created.
Arsenal need to bench Odegaard, just because his market value is high, it doesn't mean he's very good. Thomas Partey is better than him in this season.