This chart was NOT created by me, so no questions asked about it, can and will be answered by me. I am just re-posting this here as it may be helpfull to others. Original Link: https://twitter.com/Korean___Dramas/status/1537389728659427333/photo/1 
Welcome. I think you may only need it during eps one and two maybe but those are so important as they build the foundation to understand all the ongoing relations and plots. Thats the main disadvantage of the shorter format. Because of this the drama has to start with a relatively high pacing and due to this some clues might be missed. In my opinion the drama does very well and correspondend with your fantasy drama expirience you may not need any chart or explanation at all!