Welcome to this site. It truly is a great site for learning everything you need to know.
I too am a first timer that got my ten girls from my local feed store 5 1/2 wks ago.
I went with the chicks that are dual purpose, cold hardy, and known to be nice. I am very happy with them. The 3 Plymouth Barred Rock are by far the most outgoing and friendly chicks and growing the fastest. Of the 3 buff orpingtons, one is very outgoing - flys on my lap, on my back if I bend over the brooder, doesn't mind being picked up. The other two are a little standoffish.
The 2 americanas (EE) are very shy. One of them will let me pick it up but doesn't like it. The other one is the most standoffish of all the bunch of chicks. Has always been the one to squack and carry on like the sky is falling when ever I get near the brooder.
The 2 Rhode Island reds have always let me put my hand up to them without running away. They are maturing slower than the rest.
Of my 10 pullets, I was hoping one ended up being a roo but so far they look to be all hens.
Being that this is your first time as well, I would recommend you stick with 8-12 hardy breeds and save getting silkies for later. All the chicks look so small when days old at the feed store but man do they grow up fast.
Make sure you have a brooder that is big enough to handle the number of birds you plan to get and keep in there for 6-8 wks.
Good luck and enjoy everyday with them. AND lots of pics.