I am 37, 5 foot 9 inches tall with a BMI of 32. I am currently being assessed to take on care of my 5 year old great niece, everything else is going brilliant but seems social services think I’m over weight. Although in the last 12 months I’ve gone from a size 18 to 14. I have seen women much bigger than myself who are caring for young family members, I’m not totally sure of my weight.
I guess that you are looking for some advice on losing weight? If you are 5’9” and your BMI is 32, you must weigh around 218 pounds. Your ideal weight will be below 169 pounds.
However, you are not what is called morbidly obese (BMI over 40) so I do not see how you could be considered too overweight to care for a child. You are young too, which means that you are probably relatively healthy.
Do you exercise? If not, start exercising and tell social services that you are exercising daily to improve fitness and that your BMI is not actually so high to put you at any significant health risk at present, and you are working on getting fitter and slimmer.