I saw your name and just had to give this story a read. It's excellent that you decided to take the leap and write a story of your very own! I'm certain that you are going to enjoy it, and hope that your skills as a writer continue to develop.

First thing: The formatting system on this site is less than stellar, so my reccommendation to you is this. Create a google account and create a Google Doc inside your Google Drive where you can write this story off-site. This will be helpful for several reasons. First, it will prevent you from losing a ton of progress if a chapter doesnt get uploaded properly. Second, Google Docs has proper spell checking and grammar checking tools that will help you improve the quality and learn the way that traditional english writers/speakers expect to see things. 

Now, onto the story itself. I think you have already managed to create a very likeable protagonist, and I'm eager to get to know the variety of sisters. It seems like they ware going to have very different personalities and I LOVE that dynamic. 

Overall, I cant wait to see how this story develops, and good on you for having the courage to write a story in a secondary language. Keep it up!