I say your chances are pretty fair. I spent alot of time on my G2 before flying my PT40. Yes it is different from the sim, but if you have plenty of airspace and a large landing area to give you plenty of room for error, go for it. Get some altitude right after takeoff to allow for errors, some breathing room ya might say.I did it, and many others have too.
Now a bunch of folks are gonna jump in on this thread ( they always do) and say your just short of being the 'town fool' for learning to fly without an instructor. Hey, it's not rocket science, take it slow and easy.
If you have enough room, just do some fast taxi passes on the ground, see how the plane reacts. Then do a short hop to see if the plane is gonna go left or right on it's own, then make some adjustments. The hardest thing is getting the plane trimmed out right, again thats where altitude is your friend, gives ya some room for error. Don't panic and over correct, that is the biggest mistake. Don't put too much throw into the ailerons, or elevator for that matter. A learned flyer does help when getting a new plane timmed right, yes indeed. But if I can do it, they just about anyone short of being a complete spaz can do it.
Good luck to ya, and let us know how it comes along.