Looking for in depth tutorials on modeling with subdivision surface modifier

I love modeling on simple shapes while seeing the subdivision surface modifier turn it into smooth shapes. Do you know of any in depth tutorials, including paid ones, that use it a lot? I’ve seen the usual youtube ones where they explain the basics, and it comes up naturally in larger tutorials.

I’m very interest in one that goes really deep, so I can get a much better understanding of it and use it like a wizard.

Thank you!