No! No safety hole! It's way too soon. Don't attempt a safety hole until
after Day 21.
Every one of us has had a "first time incubating" at some time, right? The hardest thing about it is to be patient and resist the urge to 'help' them. Consider this: Helping too soon will almost certainly result in death. Helping late can sometimes be too late, but they might hatch on their own anyway. So... your best chances are to wait.
Read this article, and then read it again before you do anything to help the hatch:
https://www.backyardchickens.com/articles/guide-to-assisted-hatching-for-all-poultry.72886/
It IS exciting, isn't it? We've hatched several batches over the past few years, and it never gets boring. We're like kids at Christmas, watching for Santa to arrive, every single time. Good luck with your babies!
