As a new basement FFL holder I wish I knew all the answers also. When the ATF came out they weren't all that clear.
1) You can do face to face instate only, just be sure of your state laws and the required paperwork.
2) you can ship to an FFL direct if that state allows it. I am not sure of all the state laws but I have been told in the past that a particular state required that it come from a FFL. Not sure if it is true?
3) Fed Ex and UPS will ship firearms but they must be dropped off at the main hub. No strip mall shipping shops. Also, you must declare that it is a Firearm. About 50/50 if they check the box and ask for the receivers FFL info. They don't know all their own rules either. They must go overnight and it is costly depending on how far away it is going.
4) I will give a copy of my FFL to a Dealer only. It was to hard to get to chance someone messing with it.
5) For your protection yourself I would use a FFL on both ends, let us exchange info and you have no worries. There are far to many horror stories about things going wrong and this way you are protected. You still handle all the money and let them do the paperwork. You should pay 25.00-50.00 on your end.
6) Also, if your state has a sales tax and your seller didn't collect it your receiving FFL is supposed to, at least in Michigan.
Hope this helps a little