I think the OP needs to look at FPS Creator or something more like that. He sounds young and inexperienced with game dev. Start with one of the many “build your game with a few click” engines, and come back to UE after you get some experience. That’s how I started too. If you could really create a great game with a few simple clicks, studios like Rockstar wouldn’t hire hundreds of people to the tune of tens of millions of dollars a year. Imagining an idea or storyline is the easy part, I’m sorry to say. It’s accurately getting your ideas implemented that is the hard (and expensive) part. Anyone can daydream for a few hours and come up with some ideas. As for free marketplace content, don’t feel so entitled, is your game going to be free? If not, why? And why would you expect other people to work hundreds of hours for no money? Unreal Engine is NOT a starter engine, you probably want to try Scratch, Game Maker, or FPS Creator to really get going with some basic game design.