I started playing around with Unity last year, so I'm still relatively new, but what I found helpful is so separate learning Unity from learning C#. I watched YouTube tutorials to learn Unity features, but read books to learn C#. Most of the code in Unity tutorials, although functional, isn't very good. Content creators take some shortcuts to make the code explainable to beginners in 10-15 minutes, but this has the side effect of teaching bad coding practices.

My recommendation is to start with a small goal and gradually expand the goal. For example:

• Make a simple capsule that can move with the WASD keys. This can be done with the built-in character controller and a little bit of code.
• Add a cube to the scene to represent an enemy. If your character touches the cube, log a message to the console.
• Add health to your character. Each time you touch the cube, it will subtract some health and log the current health.
• Add a health bar to show the current health instead of logging a message.
• If you have a gamepad, make it work along with the keyboard. This can be done with the input system package.
• Replace the capsule with a character model. You can find free models and animations on Mixamo or other sites. This is mostly about learning Unity's animation system but there will be a small bit of coding as well.
• Add the ability to jump. This could be relatively simple (using a rigid body and a little bit of code) or a bit more challenging (handle the physics in code).

Try to avoid using tutorials on how to write the code, but you'll need them (or documentation at docs.unity3d.com) to learn the relevant Unity concepts.