I imagine it's very stressful for those first few hours in particular, and probably days if there are issues. But it also must be so exciting, rewarding, amazing, gratifying for all the times those chicks that make it and go on to live happily with you. I like the idea of knowing them from their very first day, but I could be accused of being obsessed with my chickens (none of which I hatched - mine are all ex battery).
Some people do decide it is better suited to them to obtain pullets when adding to their flock, one reason being they don't have the worry of birth deformities, losses and some diseases. Others would never bring in outside birds and would only add to their flocks, others do both. A totally personal decision.
I would say, take this one day at a time. There really is a wealth of knowledge here to help you along. Time zones can play a part. I'm Ireland so it's morning here right now. But for most on the forum it's the middle of the night right now. Once their morning comes around this place gets busy, fast, with brilliant brains - so hang in there!