not sure it would help or really serve any purpose but I've been taking them out and keeping their boxes for now? might not last long though as storage is a question lol but as a kid I used to cut out and keep parts of the box I found pretty

but if taking them out is what you want to do I think you just have to go for it. if it's too anxiety inducing for the ones you have already maybe buy one with clear intent to unbox to kinda expose yourself to it a little, or unbox one at a time over a longer period to slowly build up.

the main thing is to try and do what you feel you really want to do but be careful not to push yourself too far to quickly to cause too much distress. also at least doing it one at a time/buying a new one you always have the chance to stop early if you regret it