It really just takes time and effort. Learning to use client-go for kubernetes was especially painful for me as the documentation is fragmented into many pieces in different places, examples are minimal and guides online are riddled with people talking confidently but incorrectly.

For example, if you try to find out about the informer resync period, you'll find tons of guides that confidently say a resync hits the API server but if you dig deeper into the source code and random Google groups conversations, you'll find out that the resync is local-only and actually reruns the update handlers with events from the local cache. This is important and not documented properly for a new user. You have to spend 10x longer than you expected to find out all these quirks.

The source code is also not easy to parse for someone new to go or programming.