Best sources for 'studying' Bitcoin?

I hear a lot of the time that I should 'study' Bitcoin but most research always points to the surface level common knowledge of Bitcoin that I see on repeat 24/7. I'm wondering if anyone has any sources to some in depth content I can't read up on to reallllllyyyyy deepen my knowledge, The mechanics behind it etc. At the moment I'd still consider myself a novice I only know some of the broader things like the halving, the 21 million supply, etc.