Short 'How to download ebooks and send to Kindle' document

I am looking to create a short document that provides step-by-step instructions on how to download ebooks in ePub Format to different devices (PC, MAC, iPad, iPhone, Android phone or tablet) and send them to a Kindle device or e-reader. The document should be in Word format, but I am open to any visuals or graphics that could help to illustrate the process. My preference is for step-by-step instructions that cover several methods, but I am open to any suggestions you may have.