Advice for best path to working with Amazon Web Services

For the last 10+ years I have been developing desktop software. I have successfully avoided learning most Web technologies. Specifically:

• ASP (any version)
• HTML5
• MVC
• MVVM

I do know a modicum of other Web technologies, like REST and SOAP services, Javascript, and altering a Web Config file. I'd like to be able to move my career towards Web, especially these Amazon Web Services (AWS). Having looked around, it seems that they are being developed by hardcore Web developers.

To be able to develop AWS, what is my shortest (or best) path through learning some of these other Web technologies?