Water: Only when your plant is completely dry. Indoors this will probably be once a month. Be sure to allow to totally drain. Over watering will cause bacterial issues making the plant soften and die.
Light: These plants will tolerate low to bright indirect light. If you want to promote growth, place in brighter light and re-pot when root bound. To keep plant from growing faster, simply do not re-pot for about a year, they like being root bound. Lower light will also keep plant from growing faster.