You don't assist feed every time it eats wrong and gives up. You need to give the snake time to settle in. Do exactly what Deborah says. She is very knowledgeable and is giving you the best advice so you can have a happy healthy snake. Assist feeding comes in when your snake is losing a lot of weight in a short amount of time. Yes your snake is young but it struck its food so it knows how to eat it just happened to take it the wrong way. Next time that happens don't jump right on assist feeding, this can actually cause stress and a regurge which can be very harmful to your snake. It will get it the right way eventually, maybe even next feeding.
Your tank seems big for a young snake. The hide on the right is very wide open and unsecure, you should have matching secure hides like the ones from reptile basics. Also tell us what your heat source is, what you take temps with, what your temps are, what you use to regulate heat source, humidity level, anything that could help us help you.
Also this is the care sheet, even if you have already read it read it again.
http://ball-pythons.net/forums/showt...ius)-Caresheet http://ball-pythons.net/forums/showt...ius)-Caresheet
Sent from my SAMSUNG-SM-G890A using Tapatalk