I'm afraid getting a ticket to the Europa League next season will be quite difficult for United considering their performance in the Premier League. If Amorim wants to build his own squad, then we will see some players leave United first and some will be brought in. The situation is unlikely to happen in a short time. Amorim will do it gradually and adjust the club's finances. Maybe United will not easily burn their money like they have done in the past.
It will be even more complicated because it is impossible for Manchester United to get players according to Amorim's needs in the near future so this can affect the team's performance in the competition in the League. Even winning the Europa League is still quite difficult for Manchester United because the team's condition is not so consistent and they will get a much tougher challenge when facing much tougher opponents. Amorim's situation in changing the team to be stronger is not easy because they have to sell some of the existing players first and after that buy some of the players needed and the club's finances must also be adjusted first.