Hello and welcome to the community!
I would say it might be best to start with the basics, follow a tutorial serie like this one: BP 3rd Person Game: Introduction | 01 | v4.8 Tutorial Series | Unreal Engine - YouTube to gain som general knowledge as of how Unreal Works.
I know it’s tempting to dive straight into making the game of your dreams, but I’d say it will help you in the end. Since you wont find a tutorial that tell you how to make your exact game 
Otherwise I found this: Unreal Engine 4 Tutorial #1 - Start Chess (part 1) - YouTube Thou it’s 5 years old and the editor has changed a bit since then, so might be confusing if you are new to the engine.
Best of luck! And feel free to post any questions you have.