Good idea. She’s still not a good heeler. Mine and natures fault. We literally live up a hill and it’s been so cold and icy here that I can’t get her out where I will be safe to work on her manners. Soon though.
Agility people are more interested in both sides heeling than hunting people, because you rarely if ever heel your dog on your gun side - but still handy to learn if, for example, you have a blind retrieve to the right and suction on the left. And very handy for hunt tests or field trials for the same reason - every little bit of gamesmanship helps!
Dogs are situational, so there will be some adjustment when you start heeling around outside. But she should be focused primarily on your knee, shoulder, and left hand - regardless of what's around her in the environment. And you will also be reinforcing the habit of obedience - and dogs are creatures of habit.
I'm starting a young Lab puppy right now on heeling, so I'm very conscious of the drill . . .