Hi, if you go to the learning center on here BYC you will find alot of helpfull info on incubating and hatching chicks. It is listed at the top of page where home tabs etc .are.
fertile chicken eggs should only be used up to ten to fourteen days, after that it slims your chances of a good hatch . I just keep mine here in room temp in the house till I get the amount I need for the incubator. they should be tilted and tilted the other way a couple times a day.
Some people say to store around 50 degrees and where it is damp. I would not put them in the fridge unless you have a frig with a set temp. for just that, as to cold will kill the embro..
when you get the amount of eggs that you want to hatch , put them in the incubator all at the same time, and yes they should be turned everyday to keep chicks from sticking to the shell.
I always get my incubator up and running a day or soahead to get my temp and humidity where I want it.
hope this helps good luck