Hi Jay
Bear in mind I have no knowledge of childcare courses
Generally, a personal statement is your chance to say why they should give you a place.
Ask yourself questions: what relevant experience- obviously loads, being a DM - don't forget this is a huge amount of valuable experience
Any other experience? eg looking after other children, playing some sort of role at a toddler group, etc
Interest in child development? Which bit of your children's development did you find most interesting?
Any experience child SN?
What do you see this course leading to for you?
Then,
What qualities do you have that are a good fit? -I'm guessing at patience, cheerfulness, enjoyment of children, good in a team, calm, ( I don't know what else would be a good idea here.)
Then , so that you're not just writing lists, which are boring to read, try to put the qualities and experience together.
eg, "whilst working in x and y, I enjoyed being a member of a team, and and having positive interactions with the public."
"Bringing up two children I have found that I not only enjoy children's company and activities, but also can be flexible , think on my feet, and respond calmly to behaviour."
Don't worry if you feel uncomfortable coming up with the wonderful qualities you have: this is the effect writing these things has on most of us.
Good luck.