Okay, hear me out. I checked the coding of this port and the level of coding is pretty advanced for my current knowledge in Ren'Py coding. So I came with a solution for this.
After finishing the current port I'm doing (only one update left), I'll start porting another game (so much simpler than the one I'm currently working on). This will give me some time to start doing this game from scratch with my style (it will take me a lot of time with the amount of paths and variables this game has, even the walkthrough is a mess with the amount of saves you need to have to see all of the scenes).
If everything goes as I think it will go (hopefully), by the time I finish my second port I'll have my port of this game close in terms of content with this port. But I don't promise anything, I'll really give my time and patience to make my port as close as possible to this one.