I got to jump into it, and found it a very pleasant experience! I will say its a good idea to read the appendix before you jump, I think if you are comfy writing stories then you can skip to the sample and then i dint do it cause i had written the story before i really got to them but I think the Bonuses would have been nice to have them higher up in the totem pole of info to use them if you dint have juice flowing in the brain lol.
I also wanted to point out it might have been a good idea to mention to roll all the dice before you start the story and then guide your story in the direction of those prompts, because I just started and then would almost have to retcon things cause i dint have all the themes in mind at the beginning, I noticed in your sample you played it that way. Not sure if you did mention it in the rules explanation but I think it was the way to go. Even though my story came out just fine.
Overall never had tried a journaling ttrpg but thought this one was very fun leans me towards trying more in the future! Nice Job! and so thorough too. 🤣