Sounds like you got a good companion! Train him now, let him be a puppy, but teach him that hunting is fun! YOu have to get him "birdy" Get him around birds as much as you can, start off with quail becuase pheasants and grouse will scare him and make him not want to hunt. Get him to learn "kennel" this is very important. Fetching will come mine had a hard time retrieving first also, get him in a place he cant escape or be destracted, by kids or anything else and just roll a ball back and forth with him, and make it fun. You can do a forced retrieve but that is painful for the dog and once you start you cant stop, or he will be ruined if you do in my opinion. Let him socialize with other dogs and hunters and make him listen to you and not get destracted, real life situations or hunting situations. Get an electic collar these are very useful, before you train him with it on if you get one.............let him wear it for like 30minutes before you start training, this will prevent your dog from only listening to you without the collar on, if it thinks uh oh i have this on so i better listen.
Hope this helps, good luck.

Here is a pic of me and my choc lab "trigger"