Author here, that is precisely the point of Blinklight (the site this blog post is from) :)
It starts from the absolute beginning, and the tools and tutorials are web-based and integrated with each other:
The focus is from Hello World to personal computer, but I've built a DSP-based guitar pedal in the past, and signal processing is really fun - I'd love to create a parallel learning path from Hello World to DSP at some point.