Congrats on your pup! With time and patience, your Golden will become an excellent hunter. I've had 5 of them. Be patient. Make it fun. Go slow and don't get frustrated. Some training days will be awesome and you'll start feeling proud, then the next day it seems like its the first day of training.
I am a believer in using treats in training. One trick that will help quickly develop your dog's reliance on its nose is to take the dog out in the lawn and give it a few small treats. Then take a treat, show it to the dog, and toss the treat out in the grass. Most younger dogs rely heavily on their eyes to find things. If your pup wants the treat, it will have to use its nose to find the treat. Eventually pup will just know to use it's nose, and as time goes along, toss the treats out further. As pup gets better and more confident, switch from treats to a pheasant wing (go to most hunting clubs on a weekend afternoon and bring your pup. Tell them you'd really like a few wings from cleaned birds. When you get home, drag the wing in the grass on a string and hide it. Let pup find it.
Remember training is setting the foundation for a future hunting dog. By next fall, instead of looking for a treat in the grass using its nose, it will be looking for a downed rooster or duck. Good luck.