looking for some info. my licence is in the process of going through. so a couple of questions. for a first time keeper would i be better off getting hatchlings, or an older gecko a few months to a year old. with heating i will be using a heat mat on thermostat. what would be the best heat to keep them at i have read numerous temperatures on the internet and in books. the heat mat would go on the side with only a small depth of sand and it would be built up to about 4 inches at the other side where i would have some wet sand.