As a philosophy graduate I would say that learning philosophy solely from books would be a very ambitious / dangerous attempt. The philosophical books can be very persuasive for the beginner in the field, leading to many misconceptions. I would recommend to take part in some (university/on-line) courses, but not in one, but at least two from different teachers.
As for the books, Plato (Socrates dialogues) is must have to understand the field. Also it's fun to read, so it's great to begin with :) The Nicomachean Ethics of Aristotle is another beginner friendly book which lays field for others to follow; it's much more practical/friendly than the Metaphysics, which should be approached only with an assistance of a good teacher (unless you're a genius like Avicenna or Thomas Aquineas).
As for the books, Plato (Socrates dialogues) is must have to understand the field. Also it's fun to read, so it's great to begin with :) The Nicomachean Ethics of Aristotle is another beginner friendly book which lays field for others to follow; it's much more practical/friendly than the Metaphysics, which should be approached only with an assistance of a good teacher (unless you're a genius like Avicenna or Thomas Aquineas).