Free: Contests & Raffles.
14mo is very young and that pup needs to open up them lungs. That's why he will range far on release. As long as he can hold perfect points, it really does not matter how far out or close the quartering is. Generally, heavy cover is always close, open isn't. Be sure that the dog will cover all the space between you and his farthest range. Where I hunt there isn't another human for miles, so I am in no hurry. I believe he is smarter than me, and allow him to do things his way. He always surprises me.
Let him figure things out.......if he's well bred, you'll have no issues. The key info you gave is he's not been on the birds you desire so what do you expect of him?? When you run him on plant birds, set him up for success with the wind in his face and then you'll start to see him shine after a few sessions.
The best advise I can give you is get him as many contacts with birds (quail, chukar, pigeons) as possible. Training groups can go both ways but the important part is exposure/repetition and trying to end sessions on a positive.
....and, make sure you train him directly "into the wind." They will work much differently with or across the wind.