OK, so let's ignore all the replies about how there are many useful Git tutorials online, or all the Git-specific advice. You say that you're only using Git as

OK, so let's ignore all the replies about how there are many useful Git tutorials online, or all the Git-specific advice. You say that you're only using Git as an example of something you'd like to learn. Are all these concepts that you'd like to learn technical/software related? If so, CodeMentor may be what you're looking for. In a more general sense, it's a very interesting problem. How do you find personalized technical help online, with some assurance that the person helping you is actually competent in the field?