Looks like I may have some info to share with you. I played FMT19 for a bit before the release of FM20. If it is still the same this year, you can just override the individual training instructions for your players on the relevant screen, even when training in general is delegated to your assistant. (may have to switch between "list" and "detailed" view, going from memory here). If you want to see the levels of youth recruitment and youth coaching, it is viewable via the Club Info (I think?) screen, where there should be a "facilities" button somewhere which shows you the same overview as in the full fat version. I hereby conclude my brief interruption.