It would be useful to connect students to projects that are relatively easy to contribute to that have community mentors, somewhat like GSoC
As a GSoC mentor in the past, I can say that I had great success mentoring students on industrial-strength projects with databases, CI/CD and tagless final approaches. It’s not that difficult but it does require time, dedication and some teaching skills.
I’m currently mentoring newcomers in my Haskell Beginners 2022 course and in Iris — a Haskell CLI framework. In Iris, I create multiple beginner-friendly issues specifically for people to start contributing to the Haskell ecosystem and learn language best practices. So they can learn OSS, various Haskell topics and improve the ecosystem at the same time.
Although I must admit, it’s Hacktoberfest and I’m quite overwhelmed by the amount of work 
It might not be difficult if you have proper skills but it’s still lots of unpaid work.