I would NOT recommend a hatchling Gray-Banded King for a first time animal, unless you are ABSOLUTELY certain it has eaten unscented pinkies MANY times!, and if you don't know what I'm talking about, well, then that would be my VERY POINT.
Even so, I think a cornsnake(there are MANY types)would be the best choice at this point, and as you gain more experience, you could acquire more afterwards.
Do yourself(and the snake) a HUGE favor, and get a good book or two on the type of snake you're interested in, this will benefit you more than you can imagine, and you can refer to it whenever you want. There are definitely some important "basics" to learn, so you don't have to get on the forum every time a problem arises that should have been prevented in the first place.
Sorry for sounding blunt, but I'm really just trying to help you and your future snake out.
best regards, ~Doug


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"Better to be silent and thought a fool, than to open mouth and remove any doubt!"