Well that's a combination I've never seen before. Granted, I tend to ignore the entire fanfiction genre as a general rule, so I wouldn't know much about what franchises work well with one another. Anyways, if you were hoping for someone to collaborate with you, I'm sorry to say it's probably not going to happen. The vast majority of newbies such as yourself don't manage to produce particularly impressive results when it's their first time making a storygame, and that's assuming they even manage to finish it at all before losing interest and disappearing from the site. Even if you think you are capable of writing a quality story, you have yet to provide any tangible evidence that you can deliver. This leaves a virtually nonexistent pool of potential helpers, and that's before taking into consideration just how niche the subject matter is.
On the other hand, if it's just advice you're looking for, there are plenty of resources out there to help you out. If you haven't already, go ahead and check out the Help and Info section on the left side of your screen. There are a whole bunch of articles there full of tips on writing, using the editor, and even more advanced skills such scripting and forum etiquette. You can also ask questions in this forum if you're still struggling after you've finished. With that in mind, here are a few bits of advice to start you out. First, be sure to draw up some sort of plan or outline before you start writing. These kinds of stories can get overwhelming really fast, so knowing where you're going with the story is crucial. Second, try to keep your first game small, 10,000 words or less. Don't try to do anything fancy, just do a simple project to get your bearings. Finally, be sure to read other people's writing and learn from it. That's one of the quickest ways to improve outside of actually practicing. Also, if someone tells you your work is bad, don't throw a fit. Instead, take the criticism to heart and use it to improve. That's the other major component to developing your skills.
That's about as much as I can do to help for now. Good luck with your story!
I can't help with content, but ... this may be stating the obvious but keep narrative structure in mind. All memorable stories follow a pattern where complexity increases, rises to challenging levels, then a change occurs that reduces complexity, bringing us almost back to the beginning while some effects of the change persist.
A simple realization of this is the classic seven-part narrative, where the change is driven by the protagonist.If Marinette is your protagonist, i would start thinking what change she can undergo: e.g. becoming more confident, or more cautious, or readjusting her priorities such as realizing the value of friendships.
In a classic story she will undergo the change in response to an extreme crisis of some sort. Think about what scene could effect the change you want to describe. Now you need to construct some narrative leading up to the crisis.
Once that is done you basically have your work cut out for you. In a 7-part narrative your scenes would be:
The above recipe basically gives you awesome fantasy stories. The majority of movies works like this (including everything that Disney has ever produced). Also once you have your plans laid out like this it is pretty clear what needs to go into the early scenes as there is a lot of setting up to do so that the eventual twist does not come out of the blue.
So we have a good story, but not a storygame yet. For a storygame you want to think about alternative endings. There is a temptation to have some 'wrong' choices that lead to quick deaths, but they are usually a let down. Instead you can have multiple endings that follow the same structure as above. For example there could be multiple ways to resolve the crisis, some of which may turn the the protagonist dead or evil (saving your friends, sacrificing yourself for your friends, abandoning your friends to save yourself, turning against your friends to become an evil superhero). Such evil bad endings can also make great experiences if you give them the same attention including the same sort of detailed ending (where the protagonist goes back to their normal life, now cackling softly to themselves).
Ideally we don't decide for an ending not in one big choice, but through a series of seemingly small choices, the proverbial slippery slope
You should really start writing articles. You could probably repurpose some of your older posts like this one to submit a at least one or two. It's a great way to get a MASSIVE amount of points without spending a long time writing story games and reviews, and you seem to have a knack for it.
Do you mean develop the plot or come up with one for you