I think don't expect too much like that at the beginning, because if the reality is not as expected then you will be very disappointed. Because after all, basically Ruben Amorim also does not have much experience to be the head coach of a top team in the Premier League, so there is still no guarantee for Ruben Amorim to be successful at Manchester United. Because after all, about Erik ten Hag also at the beginning of his arrival it was very flattered and Erik ten Hag also at least succeeded in his first season at that time.
But after all, in reality Erik ten Hag still failed and even though he managed to make Manchester United get a trophy but Erik ten Hag was still fired. So, I think there is absolutely no guarantee about Ruben Amorim, because Ruben Amorim's experience is also limited to having good results in Portugal and not for teams in different leagues.
It is only logical that Ruben Amorim has caught the eye of United fans, particularly given his track record. First with Braga leading them to a title, and then with Sporting CP where he led them to a league title after so many years marked Amorim as a courageous and promising young coach. For most United Fans, he represents a beacon of hope following his success story in Portugal, perhaps being the figure to restore United's lost glory.
However, it must be borne in mind that the Premier League is a different challenge—in fact, a tougher level of competition. Amorim's success in Portugal should certainly give cause for optimism, but it still takes time, and full support from the club and players. High expectations of him can be motivating—the fans need to expect much from him; they also have to give him that space to adapt without too much pressure to bear down on him because every such move brings quite a few new difficulties to overcome.