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> giving up at page 13

That book is the abridged simplified version, the original is convoluted even in Greek while its translations are faulty yet a "cliff's notes" version of that is too hard for you. Plotinus is Plato's Plato, too hard for most people. Read the Indians or Christian Neo-Neoplatonists. Try the Upadesa Sahasri or the Periphyseon. Pretty sure I've uploaded the Upadesa Sahasri, though not yet the Periphyseon.