What will be the work of legends? Now they seem to me some reward for the efforts of the participants
They will be coaching/supporting Youth Talents.
Will they select and train young talents? Will they act as trainers?
Yes, it is in the role of coaches, they will act. Mentors will lead young footballers to the top of glory
And how many mentors of all will be? This also determines the number of young talents that the project will be able to engage in its work.