Interesting project! A few questions if you won't mind. Do you have any engine in mind (as in one you would find preferable) or deadline for the project? Also, do you have anyone to help you out with music potentially or is it something that for now you didn't think about yet?
Thanks a lot for the answers! It would be my first time working with Live2D in a game engine if I would work on this project (though I did check its implementation before replying to your post). If that's not an issue, reach me out through Discord name: OdrzuconyKrakers
Could discuss more details about project scope, mechanics, potential plan to finish it before the deadline and see if I would fit into your project.