By horas (FA) - 14-01-2021 18:34
First off all you can always change youth by releasing and taking the new ones in the allowed period.
Also always every week on tuesdays you get free 2 youth exchanges where you can get some good talents.
If you make one off the tours you get an extra youth exchange.
From my experience when I take 23 youths academy if 3-4 of them are talented I consider it already as a good luck.