You should put an end to this mode of trying to figure out some kind of globally optimum sequence of learning. There is none. If somebody tells you otherwise, they are either lying or they have forgotten the countless hours/days/months/years they spent trying to hone their craft and in-retrospect they feel they could have avoided all this if only they knew some optimum way to learn. You are in a partially observable environment. The only way to learn is to explore a bit, consider what you now know, re-explore. rinse, repeat. Pick something, anything, that interests you and jump at it.