If you have a small stuffed animal or maybe a glove you wear often that smells like you (without any sort of perfume or chemical on it) then I would recommend putting it in the corner of the enclosure or near where the snake is a lot. I used that tactic as a just in case with my ball python when I first got him. Also don't try to pick the snake up from above, scoop them up from the side and your snake will be a lot more comfortable! This is why a side opening enclosure is fairly useful with snakes
LOL I deleted a paragraph because I read green room pythons as green tree pythons and got concerned. NEVERMIND!!
Have fun with your new snake!