Congratulations on your fluffy grey chick!
About the center-pipped chick. People have strong opinions about intervening, and it is very much a personal choice. I tend to get hands-on with chicks that may be in trouble. I have definitely saved chicks by assisting, and probably lost one by not assisting in time.
There is an excellent thread on assisted hatching here at BYC.
https://www.backyardchickens.com/a/step-by-step-guide-to-assisted-hatching
I use clean tweezers, and very carefully chip away at the hole, stopping immediately if I see red or bleeding. The membrane needs to not have living blood vessels in it, I think is what they explain. A few times, I have been able to help a stuck chick get out. Once, the chick was already gone, so I hadn't done any harm by trying. Best of luck to you, whatever decision you make.