Teach your dog to heel in 10 steps.

Heel is traditionally done on left side.

Get lots of dog treats.

Cut the treats into small pieces.

Call your dog.

Point to the side where you want your dog to walk.

When your dog comes to the  side say heel and give treat.

Do this exercise 5 times.

Don't call your pup, just point to the side.

Mark and reward every time your dog comes to your side.

When your dog gets the hang of the task. Switch it up buy increasing your pace.

Do the exercises indoors first then outdoors.