Along with letting him adjust to his new home try putting a stick in there and having him climp onto it, he'll be less territorial once you get him out.
All personal preference really. As far a lll goes I have seen great reptiles come from them but 75% of their chams I've seen from them are in very pour condition upon arrival. Pay good money for your Cham direct from a breeder, it'll be worth it trust me.
I was told it was a male but I'm having my doubts, it is a baby ambanja about 3 months old. It is showing lots of blue and green on top of head, cheeks, arms and sides with a red underside. Any help would really be appreciated! Thanks