I started with fixing typos in documentation.

I'm still not unsure if I should include it as part of my answer when asked if I contributed to open source projects or I should only mention bugfix.

> I'm still not unsure if I should include it as part of my answer when asked if I contributed to open source projects

I woud say yes, as long as you make sure you indicate the level clearly.

It's not landing a great new feature, but it shows you understand how Open Source works, you understand the value of the non-code parts of these projects, you can use the tools (I assume Git PR's), you can communicate well and work with others.

Typo fixes are appreciated but generally not something you’d put in a CV