Hello! I'm super into the idea of this jam, but I don't have experience making visual novels and would need more than a month to learn. Are you accepting any two player game submissions, or is this a visual novel jam only?
I am pretty sure your game must be narrative based, so something like danganronpa should be fine, or any other stuff like this. Also making vn's isn't as hard as you think! You can try renpy and you should be able to grasp quite quickly :3