A great way to get started with learning Unity is to begin with the Playground framework. This video introduces the idea of taking content from outside of Unity and bringing it into the Unity Asset folder, adding it to the scene, and best settings to maintain appearance.
This video is a follow along for this tutorial supplied by Unity: https://learn.unity.com/tutorial/impo...
The end of the tutorial utilizes a higher quality sprite sheet from https://kenney.nl/
This video complements Unity's Playground tutorial to help you get ready for the more advanced tutorials in this series. This tutorial was completed using 2021.3.27f1.