Theres a lot to learn and a lot of different ways of doing things, and people are really militant about their preferences. You're not wrong to be cautious.
It's tricky, you do want the chick to run out of air because that triggers the external pip, and letting that happen naturally makes it more likely the chick will be ready to hatch when it does pip. I've assisted hatches but only after an external pip, I don't know what to look for to successfully do so before.
This article may be helpful:
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/
It has a lot of information for if you do decide to intervene and what to look for to make that decision.