This is looking really cool so far. However, as someone else commented, I'm also a little bit worried the large amount of variability could become too much to develop.
But hey, I'm rooting for you! If you can pull this off, that would be amazing!
Also, I liked seeing choices in this project, unlike AoT (don't get me wrong, I still love that game too). I'm not saying you need to go crazy with the choices down the line and end up making like three different games. But even some choices that just change some flavor text can already give the player a feeling of agency.
Anyway, I'm exited to see where you go with this. I'll definitely be keeping an eye on it. :)