Learn Operating Systems and Forensics
To learn more, check out Learn Forensics with CTFS. https://academy.hoppersroppers.org/course/view.php?id=18
This is a really rough draft of a course. You probably shouldn't look at it yet, it is really just two very difficult resources that you have to do yourself.
I recommend you look through the rest of this course before heading off, but don't let me stop you.