Hey, I see leaf litter; is your enclosure bioactive? My fiance got a Japanese rat snake earlier this month, and we were going to start setting up the bioactive enclosure soon. We got a Carolina Custom Cage too (the 36 x 18 x 24 one), which is supposed to arrive this weekend.
Are you planning to put a background on the three sides of the glass? Maybe she would feel less nervous if it were covered? Even in our snake's quarantine, covering up two of the sides seemed to help and he comes out to explore more (but maybe he's just more used to us now).