Can someone help me to do this?

I'm new in Unreal Engine and I'm not a programmer. With my project ( only blueprints ) I'm gonna crazy with a lot of tutorials. For now I have all my character setup, idle, run, crouch, jump, a lot of other interaction, the classic aim style and all 3d models made by me ( I'm a 3D modeler and Interior Designer ) I'd like to shoot with my character without aiming ( in my project blueprints template you can shoot only if you are aiming pressing right mous button ), ad I'd love to have the same linked video's result.

Any suggestions are appreciated

Thanks a lot and I Apologize for my bad english.