Just start by doing a template
I wrote mine about ten times until I reached the final version
They want to know who you are, why you want to be a therapist/hygienist, what inspired you, most importantly what skills you already have?
Hope this helps
I also had a good friend (who graduated from Criminology😅) read it for me, she advised some adjustments to the wording, gave me some new ideas, worked on them and now guess what? I start in September. You Access tutor would also return it to you if they think you can do it better.
Good luck!