1) If you don t have many titles to play for this season i wouldn t spend all my resources on my players. TOP4 should be your minimum target i assume.
2)I think that the attackers are the most important players in the game and they re the spots that s needed the most to be FT.
3)You can watch daily ads (25 you can store+ 15 you can t store) and with those 15 to train your young players. In the beggining i wouldn t focus on 11 good players especially if you don t have rests, and i would focus on my most important positions (AMs and ST, GK also) the rest i would train normally.
4) Try and find an association, those tokens are welcomed especially in the beggining.
Good luck with your team
P.S if you want to go the manipulative route ( having 3* as benchers in the 1st season and selling all the bench players higher than 4* plus couple of players from your main squad to lower your best 14 rating AT THE END OF THE SEASON) it s up to you.