Some snakes take a long time to get used to you, some take a short time, some never enjoy you. Its up to the snake but my advice is to not handle and mess with them until they have eaten at least 3 meals with no problem. You can open the cage and change water, spot clean etc, just don't mess with their hides so they get used to your smell as not being a threat and bothering them. After they eat normal, then you can slowly work with them by picking them up and working in 5-10 min sessions and up the length every couple weeks. Like I said though, some snakes adjust faster and some snake species are more tolerant. My BCI girl had no stress and ate like a champ and now almost 2 years later, I leave her cage door open and she will sit with her head on the litter dam for hours just looking outside or she will curl up in a ball next to the open door and sleep. She loves to be petted on the head and body and overall likes my attention. My BP girl ate after 2 days of being home and acclimated very fast except she was head shy for about a month. Now she is fine and doesn't mind her head touched and I can even move her while shes eating as I have to pick off aspen off her rats sometimes. She doesn't even care but again you need to work slow with them and biggest thing is to get them eating first.