I agree with all that
@ChicksnMore said and will add a couple things. I don't pull any eggs until they are about 10 days developed, JUST in case! Definitely do not wash them, as it will allow them to be open to bacteria that may accidentally get into the incubator from handling. Always wash your hands before handling them to reduce the transfer of potential bacteria.
To avoid any chances at splay leg, I buy the kitchen cupboard liners that have holes in them but are a non-slippery surface. Cut to the size of the incubator and when you go into lockdown, add this liner under the eggs. Splay leg generally happens when they slide around first out of the egg when humidity is super high and moisture is all around.
I candle at 3-4 days, 10 days, 15 days, and then again at 20 if no pips yet. Once there are pips, I keep things closed and impatiently wait. Keep an eye on the air cells. Since they are shipped eggs, I don't start the turning process until about day 4--this way if there are detached air cells it gives them time to reattach. What I often do, is put them in a cut down egg carton to fit into the incubator, pointy side down for the first 4 days. This was a tip from others who hatch a LOT so I opted to do the same. Super saddled air cells look scary and terrible, but I have hatched several healthy chicks from some of the ugliest air cells, so don't give up on them just because of it.
Also you should join the February HAL so you can post all the pictures as the weeks progress and ask others when you have questions. Many of these folks have hatched a bunch and can help a lot. I am in this HAL because I decided to check the fertility in my show d'Anvers. I am also paranoid now of losing roosters, so I want babies from them just in case I lose the roosters...ya know...like yesterday when I almost lost Mr. Ball and Ariana Sushi! Mr. Ball is a quality Wyandotte roo and SO gentle...I want that DNA to stick around man.