When I was a pre-teen and a teenager, my Pop used to raise and train bird dogs...I got to do a bunch of the grunt work, but loved working with the dogs and several of them won regional field trials..
Obtain a batch of bird feathers (hopefully from your target species) and place them in an old boot sock tied tightly...It makes a good throw item, or hide item, for the dog to begin retrieving,,,
I wouldn't start it out with the process until it gets to be 4-6 months old and some of the 'puppy' attitude has gone..Start slowly and with a high degree of patience....Keep a supply of training treats in your pocket (available at most pet stores) and give it one every time it does the task correctly, along with a lot of praise and using a good boy 'happy' voice...
General Obedience Training will do a lot to get the animal into the habit of responding to your voice and set the tone for learning specific commands/reactions..
If you decide to move into the 'Flush' activity, get a wing from a target bird species and tie it to the line on a casting fishing rod, weight it so it can be cast a decent distance and then once you have cast it out, have the dog find it an teach it to "Hold" on it's point until you give the command to flush...Here again, training treats will reinforce the proper response, as well as a couple of "good boy" comments....
Good luck with the dog and Labs are natural retrievers, so the training process should be pretty quick...My daughter has two and they love to work..