I would also advocate getting females first.
I would say you should try for a 2 gene animal. The female bumblebee sounds great.
I noticed you joined in 2006 but have not mentioned any animals that you currently own. If I glazed over something, apologies. Are you just 'diving in' or do you have experience with ball pythons? Maybe you should get one as a pet for a while before deciding you're going to breed them. It's a lot of work from what I hear around here and it is not guaranteed to 'pay off.'