SSD_MOBILENET V1 model training dataset issue on jumpstart

I am finetuning the SSD model. I have five images, and according to this blog, I have converted Yolo annotations to Coco. Blog Link :https://catalog.us-east-1.prod.workshops.aws/workshops/f560a788-af64-4e5a-a02c-a6c88516ab02/en-US/industrylab/healthcare/ppe-detection

Please guide me with my model that doesn't give me the results.

I have attached annotations.json screenshot for better understanding.

If annotations.json format is wrong then please give me some links