how can it be "Amateurish". The club are going to sign players and sell players between now an the end of the transfer window, so they are not going to guarantee any player name and number that a person buys. If I were you I wouldnt get;
Maupay
Keane
Holgate
Onana
Calvert-Lewin
Even players like Branthwaite and Garner might swap for lower numbers from 32 and 37 before the start of the season and it hasn't been announced what number Iroegbunam and Ndiaye will have yet. They might wear a number for the Sligo game that they dont end up getting for the full season, because another player leaves or joins.