Here are some Youtube videos with great tips.

Beginner 

This tutorial helps you learn shortcuts.  The more of those you know the faster and more easily you can make great Games, Art, Images, Videos.

How to do Motion Graphics in Unreal Engine.   By Unreal team.

How to Make Destroyed Assets

There will be a list of plugins here linking to reviews.

Inspiration

A lot of this looks incredible.

Beginner

Get Unreal Engine 5 here. Unreal is free. You must download epic games launcher first.

Inspiration

He added two donut torus objects, and linked the wave displacement to the z motion of them?

To copy the wave look for the torus objects  use  the copy modifier and copy the location of the points of the displacement? 

Beginner

Intermediate

This tutorial shows how to make your landscape look more natural.  He creates masks for the factors of mixshaders that define the near, mid, and far areas.   Then he changes the scale of the texture he is using for the ground.  He also shows how to use a masks for the mountains.