In some ways you are very lucky because your experience of high school, hobbies and life experience will already be different from many UK/ home students so you should take advantage of this in your personal statement. But you also need to make 2 things very clear. Firstly, why do you want to study in the UK and secondly, you need to show that your English is of a good standard (usually IELTS 6ǌ or above). It is no good having IELTS 6Ǒ if you personal statement is full of grammar and spelling mistakes. But DO NOT pay for someone to write your personal statement for you on one of the many websites offering this service. If you have IELTS 6Ǒ, you do not have perfect native speaker style English and universities may reject your application if they suspect it is not your writing.
Many grad programs at various universities and specialty schools will require you to write a personal statement in order for you to apply to the school and if you are not sure what to write then you need to know where to look so that you can figure it out. Because your personal statement will weigh heavily on whether or not you get accepted into the school of your dreams, you want to make sure that you write an admission essay that really wows those who will read it.