Only wowing the name of Amitabha will focus your time on the practice. However, not reading the sutras at all you will not be able to know appropriately the vision of Mahayana Buddhism. Mahayana Buddhism's vision is to lead all sentient beings to become enlightening. If you do not want to read the sutras, you wouldn't know how to become a Boddhisatva and you may not have the intension to do so.