Chris, if your goal is to get a job, it may help to think about what an employer wants to see when to make you an offer for a good first job.
Don't let this distract you from the joy of learning, or from learning material that is not directly relevant, but it may provide a motivator. In the end, you'll be providing value to someone, so you may as well start thinking of it now.
Why not choose an open-source project that is well-known, and which has been historically open to accepting patches. Then find some bug that you can fix. There are tools to help you find all this. Then submit a patch, and you can honestly say that you contributed to the famous project.
Why not choose an open-source project that is well-known, and which has been historically open to accepting patches.
How do you know as someone who never participated in an open source project whether a particular open source project is historically open to accepting patches?
Lots of people (particularly people associated with LessWrong) are telling me I should become a computer programmer; in response I've taught myself a little Python using this site, written a couple Python scripts on my own, and just now sent in an application to App Academy. But if I don't end up going to App Academy, what's the best way to develop some actually marketable programming skills? I've heard people recommending getting involved in open source projects on Git Hub, but when I looked at Git Hub I found it overwhelming, with no idea of how to find a suitable project to work on. Advice?