First, you need a good story concept. Think about the characters, their personalities, and the overall plot. Then, you should consider the visual elements like character designs and backgrounds. You can use software like Ren'Py which is popular for creating visual novels.
Creating a Dra coi Visual Novel is no easy feat. You have to begin with a great idea for the story. It should be engaging and have the potential for multiple story paths. Regarding the visuals, make sure they match the tone of the story. If you're not an artist, you can look for free or affordable art resources online. In terms of programming, you need to learn the basics of the software you choose. There are also communities online where you can get help and advice on creating visual novels, like the Visual Novel Maker community.