Certainly. The documentation doesn’t go deep. Only paper is capable of scratching the surface a little.
Can you point out what parts are blocking for you?
What I mean by that is that it looks like you are analyzing the behavior of the DB, not using it as a regular user. You are studying it through its behavior and not reading the code.
Which makes no sense, it’s easier to read the code than to experiment since it’s an open source database for anyone to audit. So reverse engineering doesn’t make sense here.