Considering that reading source code can take a long time
You'll get faster over time, until reading code is faster than reading documentation, as code will always represent what's truly happening, while docs are frequently outdated.
In a language the user isn't familiar with
If you're not that familiar with the language, it's likely you won't be contributing to the project. Open source projects usually to have quite limited resources, so they tend to optimize docs and dev UX for people who are likely to contribute.
Why so? AMD supports Wayland just fine, while having good enough performance. As a VR dev, AMD still including a USB C port on GPUs should actually be even more convenient for you.