Unreal Blueprint system is node-based visual scripting scripting system similar to Reality Setup. The user able to connect visual nodes in sequentially to do make scripting system. To start with Reality Editor scripting at least you need to have knowledge about Blueprint Visual Scripting.
Unreal Classes
Produce effective scripting, you have to understand Unreal Classes like Pawn, Player Controller, Actor etc... You can expand variety classes using Unreal Engine classes to provide real time scene.
Material Effects
Stream video input, changing mesh colors and making stunning shader effects have knowledge about Unreal Materials.
User Interface Design
The Unreal Motion Graphics provides user interface integration to serve visualization for buttons, slides, bars and more.
Animations
Creating animations, understanding the basics of Animation Blueprint required.