Ask HN: Getting started with open source as a React/JS developer

I want to start working on some OSS projects as a JS developer to improve my skills and build connections that might become valuable for me in the future. I see a lot of companies nowadays looks if you have worked in OSS or not so it will also help me improve my resume.

Not sure how to start with it and which projects to pick. I am particularly want to work on React JS ecosystem. Anyone who can guide me how should I go with it?