Get a bow, when that time comes the last thing i want to do is give my position away while hunting.
These are the typical shot sizes generally a 6 will do for just about anything. Are you using a 2 3/4 or 3in chamber or both?
Rabbit 6 to 7½
Quail, dove, 7½ to 8
Rabbit 6 to 7½
Squirrel 6
Geese BB to 2 TT to 1
Ducks, low 4 to 6 2 to 4
Ducks, high 2 to 4 BB to 2
Also when hunting water fowel you are going to need steel shot.
Also, learning how to properly field dress an animal is key.