THink about what kind of care you want to do which is based on the environment: desert environment probably requires less care once it gets set up. Tropical environment requires misting and maintaining humidity and plants if you choose to do a live tank. Nocturnal animals don't need as much care in lighting, diurnal animals either need specific lighting or specific supplementation to make up for the lighting. I got into leopard geckos after reading a bunch of care sheets for different reptiles and realizing that this was the easiest to maintain and care for. Now in addition to the leos I have a variety of other species that need more care, but the leos got me started.