This is why we say "referred obedience trainer" from someone you trust.
The choke chain imo, does have its place in a few situations but on a puppy is never one of them...
If you have the budget and are at a loss for quality resources I highly recommend the video or DVD from tenderfoot training. The video shows you how to train your dog and establish leadership.
They help on this site regularly and their philosophy of building the relationship with the dog through leadership and love (so that the dog listens and wants to listen) works......and that's why I personally refer to them over and over and over. Just so it's perfectly clear, and in the interest of full disclosure, I do not profit financially in any way at all from referring to them. I simply appreciate sound, simple and logical advice from extremely helpful and friendly professionals with multiple decades of experience.