Hi, I'm a university student studying English and I am interested to help you out with writing your admission letter. I have had experience editing college applications and admission letters, and am a writer myself. In fact, my most recent job on Freelancer was editing a study abroad scholarship application, and my employer was very happy with my work - you can read her feedback to me on my page. I know what selection committees look out for in the applications of potential candidates and I can help you achieve that.
Not only will I correct your mistakes in grammar and sentence structure, but I'll also change up different vocabulary and writing styles to ensure the letter is coherent, effective and professional so as to maximize your chances of being admitted.
I've taken a look at your attached letter and have a good idea of how to improve it. Your passion for nursing is clear, but is not as well articulated as it could be. For example, for your third paragraph, 'Ever since I was young, I have always desired to help and heal others by truly making a difference in their lives.' is a better opening sentence than what you have written. The past tense 'wanted' in 'I wanted to be able to heal...', which is what you wrote, implies you used to be passionate about healing but no longer are. Emphasizing that you've had this dream since you were young will help to convey your continuing interest in nursing.
I hope to hear back from you soon and that you'll consider me to help.