You can teach yourself no matter what you take, but it depends on your personal learning ability and self-discipline. If you score, you may not be sure. The first test of reconnection has 560 points, and there is still a gap from 120+, which is polarization. If you want to get to the point quickly, I suggest you study in the institutional system. The first place in the 23-year reunion is hand-painted, so you can learn about it.