I understand that this might be a controversial opinion, but I believe that new developers should not contribute to established open source projects. It only makes the lives of open source project managers more difficult.

If a developer cannot understand the basics of full code base, they should not contribute. This practice is essentially turning into spam and is akin to a DDoS attack on the open source community.

Many open source projects are considering going closed source due to this exact reason. People with little to no coding knowledge are literally practicing on main ExpressJS repo. What a nightmare for these project managers.