Just write with all your spirit and follow your heart all throughout the process. Really, writing is such a beautiful and powerful thing and it's wonderful that you want to write a story. I'm quite well with grammar so if it's okay with you you can send me a couple passages at a time and I could proof read them. I used to write myself and learned a lot on what makes a story successful and also considered as an accomplishment among the great works of literature. I won't steal your ideas. This was one of my main worries when I talked to people about my writing and I was thus very secretive. I really hope you accomplish your goal and I thoroughly encourage you to do so. Please message me if you'd like my help.