I just published my first article to the Fosstodon Hub community blog - Do you have to use an Open Source OS to be a FOSS contributor?
https://hub.fosstodon.org/do-you-have-to-use-an-open-source-os-to-be-a-foss-contributor/
If you're interested in contributing to the community blog, take a look here - https://hub.fosstodon.org/about