How can i teach myself to contribute to these projects?

I use open source self hosted software everyday. I love the community and I would love to be able to contribute to some of these projects.

As far as code goes, I basically no nothing about how it works. I see the development section of the repos I use and again, I’ve go no idea how it works.

How can I teach myself how to offer small improvements to the projects I use?

Not all support of oss is code related. Updating documentation is a really important part too but programmers are generally bad at it.
Translating documentation to other languages too.

Please dear god let STM or Nordic someone hire some technical writers for Zephyr, not just Nordic documentation.

The data structures, macro basics, and core concepts are OK, but for example ADCs have literally 0 documentation at all, documentation about DMAs is barebones at absolute best, non-led PWMs is not good, etc…

Pretty much every single peripheral needs 5x-100x the documentation it currently has lol.