I have written Personal statements and Motivation letters for myself and other people, very succesfully might I add. What I would need from you is a few pieces of personal information, for example something that motivates you, or why you want to study medicine, did something happen in your life that pushes you towards medicine etc. This way I can personalise it and add some emotion, which is always good when writing something like this.
Thank you and I hope you give me a chance to help you with this project.