How do I make a start on my personal statement?

Hello there!! Firstly my tips would be to write bullet points of the key things you want to put into your personal statement. 
Make sure you mention things like work experience, voluntary work, hobbies and academics. Once a bullet point outline is made start to think about paragraphs.
Which main themes would you like to run through the paragraphs? Start to number your points and gather the relevant points together. I know it it a long process but step by step you can get there - and it will be worth it!