if there is a download involved that might be an example project to follow along with. Those can be handy but you might not need to actually download it in order to watch and follow along.
Here’s a bunch of tutorials from the learning section may be good for a beginner and also some documentation with further links:
Programming and Scripting | Epic Developer Community (epicgames.com)
Your First Hour in Unreal Engine 5.0 Overview - Your First Hour in Unreal Engine 5.0 (epicgames.com)
Hour of Code: Unreal Engine - Create Your First 3D Game - Hour of Code: Unreal Engine - Build Your First 3D Game (epicgames.com)
Unreal Engine Blueprint - Is Valid Check | Epic Developer Community (epicgames.com)
Unreal Engine Essentials for Games - Unreal Engine Essentials for Games | Onboarding Collection (epicgames.com)
BeginPlay | Epic Developer Community (epicgames.com)
Blueprint Communication Overview - Blueprint Communication (epicgames.com)
the blueprint communications one in particular will likely clear up a lot of your questions.