Ask HN: How to build a 3d ipad game

Hey guys! We are a UI and a 3D designer and we want to create a cool (3D) ipad game but we have no technical skills nor we have never created an ipad game before. We will probably hire a developer for this project. But what are some basic things we need to know about creating a 3d ipad game? Rendering stuff, mapping, multiplayer interaction, connecting to a database to record the scores, etc. Thanks!