@Clara595 I highly recommend you to write stories which are of your interest-- think of something that you would like to read. Make your story realistic, so it won't bore your readers, but at the same time, explore every nook and cranny of your creative mind :) And you should really know the plot of your story really well so you won't have a hard time writing it. And lastly, give it a touch of something that you're readers would always ask for more.
I hope they can help! And good luck on writing your story! :)
ps. I want to thank you for reading my story, and it's good to hear that you loved it :)