That's where Unity Learn is a huge help. It's a website run by Unity Technologies that offers hundreds of hours of professionally made video tutorials that dive into every facet of game development.

Unity, arguably the biggest game engine in the world, is giving away hundreds of hours of premium game developing tutorials for free because of the coronavirus. For three months until June 20th ...

For this tutorial, we are going to develop a top-down game that has the player navigate a map to locate keys. This is a great first project in Unity for beginners that will teach some basic concepts.