My niece was diagnosed with Juvenile diabetes today--What should I do how should I feel?

I really love my niece and just want some advice as to what to expect in the early stages of this disease.

She is only 9 years old and she is a tough girl(not a princess type) and alway takes shots like a champ at the doctor.

But this is different. As of my understanding this is a daily process.

So if some of you can take me through a day of your life with this condition, I would really appreciate this. Thank you