Hey, welcome to tabletop gaming, and enjoy it. You are diving into the deep end taking on the GMing, but it is good to see that you are really taking it seriously, even so far as to realize that you might have a problem player that might take the whole group down.
While everyone here is suggesting more rulebooks, I am going to take a different approach. The game can be run with just the core rulebook, and I would strongly suggest is that you ask your players to take on one of the character templates from that book rather than try and build their own characters, this will keep things on a relatively even keel, at least for the first few sessions until everyone (including you) are confident with the rules and the setting.
As far as the setting goes, what I would do is just have the players read some of the background material in the book, maybe photocopy a few pages like the history and some of the stories. I would also suggest that you go ahead and use some of the free materials available on the main page like Food Fight and the Missions to get you feet wet before diving in.
I wouldn't worry to much about details like credsticks, you can tweak that with gentle nudges in game. ("Okay, so we go and look for a job....uhhh" "So are you going to call one of your fixer contacts, or try one of the 'runner bars' and see if someone is looking for a team?")
The bigger thing is to remember that everyone is new and you will make some mistakes, do your best to be fair and fix things when this happens but don't let a session get bogged down with you searching a rulebook for a particular point, do that between sessions, and let your players know the next time. ("Hey guys, I looked it up, and I am pretty sure this concealabilty rating thing means Joe's troll can't walk into the Lone Star's HQ with an assault cannon hidden under his trenchcoat, so we are gonna have to say he left it in the car, we will assume that cop just got really unlucky when Joe shot him with his pistol.")
If someone is not taking the game as seriously as the rest, and seems to be actively trying to ruin it for the group, call him/her out and find out what the deal is. If they won't fix it, don't invite them next time.