Fetch is good. It's exercise and play for the dog, and bonding for the two of you.
Fetch the easy way:
Start out using
two balls, or fetch will be "chase" and the dog will train you.
You can work some obedience into the game too. Make your dog sit, then toss the ball a short distance and say "OK" at the same time to release the dog from the sit.
Once the dog has the ball, praise the dog, call them back with "Bring!" ... they won't know what to do, and if you have only one ball, you're out of luck.
Since you have that second ball, turn away, start tossing the ball up and down in your hand, talking to yourself, having a great time with the "good" ball. The dog will now want *that* ball, and when she comes to you, praise her, get her to sit, and when she drops the "old" ball, tell her "Good Bring!" ... wait a few seconds, toss the 2nd ball with another "OK!" (or FETCH! if you like). While she's after the 2nd ball, pick up ball #1.
Repeat.
Soon you should have her racing back with the "old" ball to begin again, and if you then start timing "BRING!" with what she wants to do, she'll have that down.
Keep it short at first, young dogs have short attention spans, and one bad turn erases quite a few good ones if you are at it too long!
Soon you can be down to playing fetch with one ball, and no "Chase!" ... and that's when to work on "Drop it!" after the "BRING!" ... (keep that second ball in a pocket for backup for quite some time!)
Keep it calm, work the obedience / sits in, and the tosses short at first. You can work up to longer, more exuberent throws later ... if you over-stimulate that "play drive" early on, you will have a ball chasin' fool!
... mine is!
BTW - We use "AUS!" (out!) to release a bite, and "Dropit!" for letting go of anything else ...