Well, if you want to win now why did you buy a bunch of miserable 18 y.o. players? The recipe is very clear, it's even in the game manual. Train a couple of positions, buy veterans for the other ones. You can easily find 28+ y.o. players on the TL w/ over 10k salaries that will immediately help your team. On the other hand, have a few (3 or less for 1 position, preferrably 5 for 2 position) trainees to train and improve