What mistake did you make when your were new?

[Cat Harrison]

Yeah do not waste your time training new roles or SAs. If you really need another position covered or want a SA, just buy a player with the desired attributes

I would if I could find these on the TL:
(p.s. let me just say if you want a player that's easy to sell, DMC/MC's on all my teams get offers, even the old guys.)

Teaching young fast training players a new role isn't completely a bad idea, it does require a fairly large budget of greens and patience.

SA's can be a waste, but again, if it's a fast trainer, and the SA complements his attributes, it can work out well.