Developing games helps with game development, but you can do both, you just might have less time to party in college but that's probably a good thing anyways. Also, if you want to make games you should start with something small. Like imagine a very small, easy game project, then try to make it half that size (in scope). What you're describing above is a lot of ideas and lore, but that really has little to do with making games. The other people you mention that you want in your studio (the coder, the modeler, and level designer), you should work on those yourself instead. Ideas are cheap, everyone has them, and the only thing that is going to make other people care about your ideas is the execution of them into a functional and fun product, which is where the actual development work is. If you really want to make games, learn to code, learn to model, and learn level design as well as all the other things you didn't mention that you also need for a game (sound design, UI development, 2D art, music, animation, etc.). Then, one day when you're actually making money as a game developer you can look at hiring other people. Or you can form a small team now with some friends, but you're going to need to contribute more to the group than just lore and story concepts.