I've found it useful to have a goal when learning a big codebase - for instance, you could pick one of the issues labeled with "has repro" like: https://github

I've found it useful to have a goal when learning a big codebase - for instance, you could pick one of the issues labeled with "has repro" like: https://github.com/LadybirdBrowser/ladybird/issues/3512 https://github.com/LadybirdBrowser/ladybird/issues/3512 and then start tracing how that HTML turns into the wrong shapes being drawn.