I am interested in metaphysics. I heard that Jia, a master of Feng Shui, gave a course. If I sign up for his course, will I learn anything?

As long as you want to learn, you will naturally learn something. His course may be helpful to your systematic study. However, metaphysics is an abstruse course. If you want to teach yourself, you may not understand. You still need the guidance of a master. It is also a good choice for you to sign up for his course. After all, he is experienced in actual combat, not an armchair strategist.