I am in my mid-40s and just ate 6 large chestnut manju breads

How is this amount?
Will it cause any major issues for my body?
I am the type of person who cannot practice self-control once I start eating, so
I just sat down and ate 6 large chestnut manju breads with 500ml of milk.
My HbA1c is around 5.7-5.8,
and I don't have any other particular issues, but
I am quite interested in managing my health.
I keep saying I'll reduce my carbohydrate intake, but it's not easy to actually do it.
How is everyone else managing their diet?