In this tutorial, we show you how to create a basic 3-button menu system using SLATE. This is considered an advanced tutorial because it assumes knowledge of Unreal Engine, C++, and Visual Studio 2022. By the end of the tutorial, you should have the knowledge you need to begin coding in SLATE and creating UI systems.
https://dev.epicgames.com/community/learning/tutorials/GWMZ/a-basic-introduction-to-slate-in-unreal-engine-5-6-advanced-topic