I have started  a page of links to maker skill tutorials published by others here. It is a highly curated list of tutorials that I feel are accessible to beginners, relevant to the kind of maker projects provided on this site, and from reliable sources. Moreover, the focus will be on basic processes and components of commonly used hardware rather than projects, complex systems, software, or specific brands. At the moment, it contains a good list for electronics. I will be adding other subjects over time.