Contributing to documentation is really impactful for an open-source project. It can also be a stepping stone to make code contributions. Learn how.
Google Summer of Code (GSoC) is a great way to start contributing to open source while getting paid to do so. This article dives deep into everything GSoC from the application procedure to tips from real experience on being successful
Tips to make High-Quality Pull Requests.
Open-Source is not just about code. See how you can make non-code contributions to open-source.
A curated list of Open Source Internship Programs with all the necessary details.