How best to develop a player?

My academy just gave me a 24T youth. He's a duel role player, DML/ML. Height = 181; Weight = 77. Right footed.

Does being right footed on the left wing hurt the player?

What's the best special ability for him given his height/weight?

What's the best 3rd role?

Best stat distribution (defense, offense, Physical & Mental) for a player in these roles? My stat distribution, I means something like (0. +20, +20) or (0, +10, +20)!

Thank you for any advise provided!!!