Thanks @crokkon!

About the scouting, it might start to pay off once you have higher level youth academy. I have around 50%.
When scouting you want to train your new players for a couple of years, say from 17 to 21, and then start playing it or sell it. I personally keep the scouted players above 60 or close to it, 58, 57. Out of ten scouts I might get one or two like that.

It is a game of chance :)