im thinking about getting yabby's?

im thinking about getting yabby's? - I want to get some yabbies for my 6 gallon tank, How much should i get, I was thinking of two? How do i breed them, are they easy to breed? Can i add a bit of fish to the tank? Can i feed them some types of meat or fish? Alot of info would help. I have studied a bit, but more info would help

im thinking about getting yabby's?