Calling for Resources for Learning Common Skills
(slrpnk.net)
This community is primarily structured around the sort of subjects you would see in an academic setting, but learning skills is absolutely within the scope of this community. If you have any, please consider commenting with free resources and advice for things like playing an instrument, learning a language, woodworking, etc.
I love it. It's not a study plan but more a serie of mini goals that will make you progress if reach them. It is also a very fun way to track your progress.