welcome,
lots of ways to go about it,
first, have you and/or your son taken hunter ed courses?
if not good way to start, having both of you take the courses together, be surprised how much you learn just from the courses,
in the mean time, get out there and learn the land and animals,
dont need to hunt to be out scouting,
getting out there is the first step, even if you and your son just got out with a camera,
take it in small steps,
safety first,
even if your not hunting just out hiking,
for safety sake wear orange, be aware of seasons, and try to be courtious of other hunters in the field,
dont want to walk by a hunter thats been calling in a turkey all morning and spook his game,

even if your just going out for a short hike, treat it like an adventure for the kid and gear up with safety equipment,
learn to hunt small game first,
turkey/rabbits/squirrels/coons/etc....
gutting and cleaning small game will give you idea what needs to be done on larger game, just on a larger scale,

also will you be bow hunting? gun hunting?