I have tried several times. At least, I've looked at a few of the suggestions on how to get started. All of the ideas don't quite work, though. Namely because most of the suggestions are things that I've either never even heard of or that I do not use. The gardening approach mentioned not long ago on this site seems very good for beginners - but I feel that just jumping in and starting with this could be a bad thing if the organization already has some sort of system set up.
For example, I have used Express. I don't really understand it well enough, and I've never had reason to, jump into the source code. There are only ten open issues. For just about every open source thing I've used, this is the case. Am I just doing something wrong?