Without a lot more information, such as what you’ve already done, pictures of your code, and so on, it’s hard to tell you what you’re doing wrong.
These two tutorials should give you enough information to do what you’re attempting- after you have watched these and tried to follow along, if you bring us pictures of your code when you hit a road block we can try to help! 
Disclaimer: These links are not associated with Epic Games, Unreal Engine, or their partners.