No pulling on lead

There's lots of ways to teach every exercise
Every dog is different this is just one of many ways to teach your dog to walk without pulling
First have a motivated dog
As for equipment I personally don't think it really matters if it's a collar or a harness
A harness makes it more comfortable for a dog to pull.

Find a quite boring place with dog on lead take a step back when dog follows the one pace reward, repeat a number of times make it fun and exciting to follow you .
Have frequent breaks don't train for too long, get dog to follow back again a number of times and reward each pace.
Now repeat what you have been doing but this time sideways away from the dog.
So now dog moves with you as you move back and sideways well done 👍

Now try adding a command just before you move back or sideways eg let's go then move dog follows and reward, now try saying let's go and move a pace forward dog follows and then reward look your dog's haven't pulled

What we are doing is teaching dog's to follow you and stop automatically when you do and to enjoy being with you

This is just the beginning I will put a bit more information about this next week 👍😊