What type of conure? There are vast differences between the species. I must say that my biggest mistake was impulse buying our first bird. But being is he is a green cheek conure, that mistake was forgiving and we have since adapted and bought a second bird (sun conure) after research, I wouldn't trade my boys for anything.
With the amount of research you seem have to performed and picking him out by hand, I would say you will do fine.
OK one big mistake, even if you think your bird cannot fly....do not take him outside. I thought my sun could only flutter to the ground so I took him out to bring the trash cans up while he was on my shoulder (as I had done several times previous) but this time....bam he flew off, soared up into the sky like an eagle

and it was only by the grace of God that I was able to get him back. After a couple laps in the neighborhood, with me running like an idiot in chase, he finally landed in a tree in my backyard.
Best of luck!
Stanley the Sun Conure

Ollie the Green Cheek Conure

Stan and Ollie the great comedy duo, always making me chuckle!!