Ruben Amorim must avoid the talk that Erik Ten Hag often does about this promise, that and all sorts of things. Because usually it will be much worse if you can't meet expectations. Amorim must focus on working and talk less. Reflecting on other teams whose coaches are rarely in the spotlight and are able to perform optimally. Chelsea under Enzo Maresca focuses on working hard, building the team and not making small talk to meet the media chatter.
This is not smart and I think Amorim still underestimates how many difficulties there are to overcome in order to bring Manchester United back to trophy winning levels. But he knows that if he gets fired, it is going to make him rich regardless of anything else. Since Manchester United wanted him so badly and signed him in the middle of the season, rest assured he has negotiated a very favorable contract for himself and Manchester United, IIRC, also paid a transfer fee for him. He is in the pole position no matter what is going to happen. If they lose, he can blame he predecessor ten Hag, if they win he can say that this is the Amorim effect, if they fire him he gets paid the salary for the entire contract duration.