@a0bara-chan Sorry this is super late, but yeah, sure..!
First off, you always want to make sure you have a solid story line idea. I would not recommend starting a story, and then not know at least a general topic for the plot. It's better to know, so you can keep making the story better, by building off that.
Secondly~! You always want to use good grammar and punctuation. If you don't (frequently), then your story will be a bit difficult to understand. It is fine if you make 1-3 small mistakes, no one's perfect..!
Third off...! Feel free to write whatever you want, but don't copy other people's work. If you wish to reference their story or use one of their ideas, be sure to credit them and of course ask them first..!
And lastly...Have fun..! Don't make it a chore to write, make it a hobby. It shouldn't Feel like a punishment to update. Unless your story is intended to be serious, try to add in some light-hearted content as well.
I hope that these things helped..! If you want/need anything else, just feel free to message me any time c: