Hi Scuba Steve,
not a pro,only have 20+ years in flying,welcome to the greatest hobby/sport in the world. Your train of thought is normal,hope that doesn't ruin your day. My advice to all new comers is to find a flying club, meet some of the members,see what they are flying,and talk to some of the instructors,if your new radio doesn't buddy box with there's then that might be a little problem,also lots of clubs have planes and instructors to start ,some are even free the first time or two,might save you a.05 or two,
Check the water first,John