Ask HN: How do you dive into a new framework/project?

Last couple of weeks, I have been trying to learn Vue.js from docs and guides with some amount of scratch-pad code. I am not a very experienced programmer, but most of the times I have written a lot of vanilla javascript, trying not to introduce unnecessary dependencies into the project.

So How do you start investigating into a new framework/project? How do you probe its internal mechanisms and overall architecture?