Start of by brainstorming ideas which you think make you unique. For example an experience or hobby that you have. It can be anything that you believe makes you different from others. It is recommended to plan your paragraphs seperately, firstly u can start of with, why do you want to study this subject, secondly you need to answer how your current subjects link to the degree you would like to apply for. These are base points which you can start from, creativity is better, show any skills or extra curricular activities you joined. Start by brainstorming these ideas and writing it will become alot simplier.