It seems that the 'Getting Started Objective' is no longer able to be completed. An alternative, easy set to complete is the 'Silver Player Upgrade' set which only requires 7 bronze players.
In Madden Ultimate Team go to Items > Sets > Warehouse > Silver Player Upgrade
I suggest getting bronze in all of the drills in training mode first since you get a free pack with Bronze players in it for completing each set of drills. This will give you more throwaway players to put in the set. See
https://www.trueachievements.com/a203174/understanding-achie... for more info. on the drills.