I am in the same boat so I dug some more and here is a list of easy tickets : https://code.djangoproject.com/query?status=!closed&easy=1
I also imagine that reaching committers through irc will bring some ideas to work on.
[0] https://docs.djangoproject.com/en/dev/internals/contributing...
It would be cool to see lists of how you can triage (e.g. encouraging people to help reproduce) or add tests (e.g. areas that could use more tests).
When I started a new job earlier this year I actually jumped at the chance to grab some documentation tickets, because it meant I had to not just halfheartedly skim through the relevant code but actually read it in detail and understand what was going on.
(and, of course, I ended up finding a bug)