I also am not an expert, but I agree with sharp. I originally planned on starting with 1 male and 2 females. I bred the first female with plans to breed the second six months later. I thought this would give me a near constant supply of eggs, since my first female laid a clutch every 6 weeks from a single breeding. I am now holding off on breeding a second female until after all 88 of the eggs hatch. It has started to set in just how much work these little ones are going to be. I am not sure I will be able to handle more right now. I want to get the hang of raising the little ones and then I will decide if it is something I want to continue.
I would take it easy to start, then after you have raised all the young successfully from the first clutch, add to your breeding program. If you take on too much all at once, it is the chameleons that will suffer for it.
Good luck! It has been a fun experience so far, but the real work will begin for me in the next couple of months.