Being inexperienced I’ve taken the dont assist approach always. I’ve assisted the last hatching eggs that just needed some help breaking out of the shell probably due to the bator being opened.
I had 40-something eggs make it to lockdown in my first hatch, they were virtually all shaking around and many chirping but I only hatched 25 or so I think. I didn’t open any of them because I didn’t want to feel like “what could have been”....
There are a lot of very experienced hatchers that swear by the "don't assist" approach and there's nothing wrong with that! It's how nature does it and they seem to have things down pat, lol.
.. 11 easter egger mixes and 12 mutts from my own flock.. today is day 1, so expecting hatch to start on the 29th or so. 
Welcome! What incubator are you using?
The only thing saving me is that I don't keep most of the chicks. I'm mostly hatching for other people now because I just love doing it so much! 
