That's an interesting Idea @
badi90 .
Of course you need to do a lot more work to begin to create content that might become a game:
1. a story outline and overall plot,
2. main character descriptions,
3. design the locations
4. detailed plot for intro, chapter 1 etc.
5. any specific scene ideas?
6. if you want a "sandbox" style with tasks to raise stats / triggers, then write our all that information (at least as needed for the first parts of the game).
7. If you want a VN style with a few choices in between dialogue and scenes, then write out those plot branches and how the story will be affected by choices and how you plan to bring the branches back together again.