Don’t worry so much about humidity it is a secondary issue, a constant temp of 99-101 is far more important (use extra thermometers, the little digital ones for reptiles are nice, get a couple and watch them instead of the incubator temp). For candling wait until at least day 3 (72 hours post start of incubation) but day 5-6 is better for a neophyte. The top egg looks like it started to develop but isn’t progressing, the second egg has some odd dark spots may just be the pic, but they all are developing (except maybe number one) just keep your temp steady and make sure your humidity at lockdown is above 65%, and candle every couple days, comparing your eggs to each other. A darkening, red or dark egg is good, a clear or light egg is infertile or early embryonic death. The contents should ooze like honey not slosh like water, sloshy eggs are usually dead. They should all be progressing together, lighter eggs are often quitters, or dead embryos.
