Getting a crested gecko, tips and name suggestions? ☺️

Im getting a crested gecko real soon (already bought and its coming) I have a terrarium already but its horizontal and from my research they need a vertical terrarium so i talked today with the terrarium making shop thing and i think it will be done soon, i told them the terrarium needs to be habital for credted geckos etc etc. Im really scared that the gecko will die so i need tips on how to keep it alive and healthy, also need name suggestions.

This is the little fella btw (i think his a tricolor harley quinn but i might be wrong)