Have you checked out your area if there's any breeders around you?
If you don't care about the age you could go with an adult. I got kirby when he was VERY young, just a week out of his egg, few inches long. (I was able to do this because I knew what I was doing, this isn't recommended for others to do)I was reading how delicate babies are, so maybe for me i'd want to get an adult. I'd always be worried about doing something wrong with a baby
I was always told they need belly heat to digest their food. Not ambient temp, but surface temp.I have a red bulb that keep the tank around 79-85 degrees. The light is on one side, so I have a cool and warm side.