The Soul type Magic is simpler to describe than the others, as there are only three schools, and only one of them is further subdivided.
Spirit School magic deals with shaping your own spiritual energies and how they interact with the spirits around you, embodied and otherwise. Its subschools are Aura, Potence, Pulse, and Vessel.
Truth School magic deals with releasing the true nature of your soul. Perhaps you have greatness inside you, or the potential for phenomenal magic, or maybe you're not even human! Not originally. The only subschool here is True Self Magic.
Ancestry School magic identifies you as the most recent link in a noble chain, the greenest twig of the family tree. You have a great many ancestors in your past, and some of them could be leaders of men, mighty generals, wise mages, or even something entirely inhuman, like an Elf, a Jinn, or a Dragon. By pursuing the Ancestral Spirits subschool, you travel the world in search of the lingering will of each and every one of those who came before. They will communicate with you, and offer you quests. On completion, these quests could grant you money, magical items, other items or properties they once held, ancient servants of the bloodline, advanced abilities or traits, and even magic powers! Depending on what boon your Ancestors choose to bestow, you could end up with any subschool imaginable -- Fire, Lightning, Space, Time, issues of blood and brain, the options are wide open! However, the amount of control you have over what you get is...limited.