Others can feel free to correct me...
Just a couple of things off the top of my head.
You definitely have to report crew incapacitation to NTSB when (if) you make it back on the ground
(NTSB Part 830.5.a.2)
But you can do anything if you act/look/sound confident enough, whether you pull it off or not is a different story.
Your friend's dad will probably have a radio tuned in somewhere with someone, so you should declare an emergency over the radio.
Before transmitting though listen to see if anyone is on the radrio. When there is a break in transmissions, simply say, "Mayday, mayday, mayday, (aircraft call sign) declaring an emergency, explain your general situation (I'm a passenger, the pilot just passed out), give your position if you know where you are (10 miles north of whatever airport/city/prominent landmark or if you can read instruments 10 miles DME on VOR R-265, or on a particular airway...)
Squawk 7700 with the transponder (that will set of all sorts of alarms in the ATC facilities around the area if you are in radar range.)
If you can't raise anyone on the radio, try to tune in 121.50 on any radio, dial it into the standby window and make it active. Or if the radios are the older dial type, try to remember what frequency was there before you dial in 121.50. All the towers usually monitor 121.5. Then go thru the whole transmission routine again.
If you don't know where you are, ATC will probably ask you to key the mic to DF your position if they can't find your transponder on radar.
If no one answers you back on any radio, then continue to squawk 7700, eventually you'll flying to a radar coverage area and someone will notice.
Check up on the pilot to see if he's still alive?
Take a look at how much fuel you've got left, look around for airports, suitable places to land and land the thing... (You said you were confident
But keep cool, calm, and collected and you should make out okay if you can land the plane. (I don't know what you've learned in flight sims...)
As for whether I'd want to be in this situation, nope.
Bonus animus sit, ab experientia. Quod salvatum fuerit de malis usu venit judicium.