I'm afraid I can't help with the sexing of them

But I had some a wee while ago (bought them on impulse at the mart cos I felt sorry for them) They are escape artists (or at least mine were !) getting out through a gap of less then an inch wide

I was also under the illusion that they couldn't fly - maybe they can't ? But they can jump 6 ft in the air when they want to ! Needless to say, mine went to live with a more experienced keeper who had plenty of others to keep them company. I think they do better in big groups and for every male you'll need 10-12 females to keep them busy or they'll fight with the other males - but having only had mine for 2 weeks I couldn't say for sure

There are a few folk on here keep them though, so hopefully you'll get more advice.
Good luck, Karen