Internet is a good source for anything you want to learn about. So, you can start from there.As far as rebuilding motors ( how): Many trades do not getting to that. Set up you have to have and doing the actual work is not necessarry,over kill. It is cheaper to buy a new motor. I rebuilt motors where I knew for sure that bearings on the motor were the problem. If you have problems with the windings, forget it. There are situations where you have a special motor that you cannot purchase, you would find someone who could rebuild them for you. Example :Such as high speed motors on industrial equipment manufactured in different part of the world. May not be able to get them in this country ?. It will be very expensive to purchase them or you have no time to wait etc.I hope this helps.