enrole in basic obedience. this will make owning a dog 100 times more fun; and you will learn some vital info to make both your lives better.
keep up with the retreiving. but ensure you quit before the dog loses interest. maybe 3 or 4 times and that is it; depends largely on your dog's personality.
after the first two, try to get your dog on some birds, whether they be wild or pen raised, the more birds your dog sees the better. do some reading, there is alot of good info out there. also a book called "gun dog" might be a great source of info concerning proper training. good luck and check back to keep us up to date.