Problems with audiobooks and audio dramas

[Memfis]

I love audiobooks and audio dramas and want to add them to Jellyfin, but it doesn't work really good in my case.
I have hundreds of audiobooks and audio dramas, so I have to organize it clearly

First: The folder Structure:

Jellyfin -> Audio -> Audio Dramas

then the name of the Series, for example: "Harry Potter"

than the episode name, for example: "01 Harry Potter - and the Philosophers Stone"

in that folder the mps3 in chaprters, for example: "01 Harry Potter - The Boy Who Lived.mp3", "02 Harry Potter - The Vanishing Glass.mp3", "03 Harry Potter - The Letters From No One.mp3"

So the complete path could be: Jellyfin -> Audio -> Audio Dramas -> Harry Potter -> 01 Harry Potter - and the Philosophers Stone -> 01 Harry Potter - The Boy Who Lived.mp3

Second: What I want to see in Jellyfin:

Harry Potter -> 01 Harry Potter - and the Philosophers Stone -> all mp3-files to that episode, sorted from 1 to 999
Harry Potter -> 02 Harry Potter - and the Chamber of Secrets -> all mp3-files to that episode, sorted from 1 to 999

Harry Potter have seven books, and this is not so dramatic, but I also have audio dramas with hundreds of episodes and so it should organize inside the series name.

Third: What I see for now in Jellyfin:

Harry Potter - and the Philosophers Stone -> all mp3-files to that episode, but unsorted
Harry Potter - and the Chamber of Secrets -> all mp3-files to that episode, but unsorted

Could you please help me to solve that problem?
I also have the problem, that Jellyfin dont display the covers I include into the mp3s with the Tool "MP3Tag"