Help a new person with his first game

You can do it. Firstly, go to the Marketplace and grab all the Free Assets relevant to the game you want to develop. There’s enough FREE content to develop a very advance game, FREE Animation System, Cel Shader, GOAP AI, Weapons, Voxel System, Paragon Characters, Menus, and much more. Once you acquire the Assets, you just have to bash it all together. See UnrealEngine Online Learning and Documentation for a quick start working with UnrealEditor.