How soon do you need this work done?
I would need to order the ArduCam module - which could take 1-2 weeks to arrive.
I would use an Arduino Uno, Nano or Mega to test this functionality. (I do not have a Nano BLE sense 33 unfortunately.)
This first milestone is for saving the image to an SD card. If you want to send to the cloud I would treat that as a separate milestone - once we have the first milestone complete.
This bid does not include any image processing algorithms - which, by the sounds of it, you have already implemented anyway. This bid is for saving to SD card only.