Way too early for birds. Let her be a puppy. Right now you need to work on the very basics. No. No jumping up. No biting. Come.
Lots of praise when done well. If you really think you need to do a retrieving drill, ony one toos with something other than a bird (small paint roller, tennis ball) and in a very constrained area. Like a hallway. No more than once a week, one time.
Puppies get bored andloose interest quickly. Best way to ruin is to over train. Small training intervals of 5 to 10 minutes.
Maybe around 6 months you could introduce a pigeon. Way too ealry for ducks.
Good luck!!