I think it's better at your level to train 5 players, focusing on two positions a week instead of one. That way you can improve your team and also have some players to sell for the cash you will need as you go up the English leagues.
Both those guys look trainable, so you should look into getting 3 more 18 year old PF/Cs . No need to break the bank since they don't need to be particularly awesome now in order to be valuable in a couple of seasons.