How to use AWS IoT Fleet provisioning on FreeRTOS "release-v10.3.1", I don't want to move to AWS-FreeRTOS

With some path change and stuffs I could build the demo, Thanks
How to test this demo?

  1. What should I do on the AWS IOT CORE related to certificates?
  2. I used some command like this on terminal to create a car
    openssl req -new -newkey rsa:2048 -nodes -out google_com.csr -keyout google_com.key -subj “/C=/ST=/L=/O=Spaceagelabs/OU=RD/CN=google_com”
  3. I got the “.key” and “.csr” files.
  4. Am confused what should be used on device and what should be done on AWS IOT and IAM portal?
  5. Any steps or document which explains step by step procedures on creating Fleet provisioning setup on AWS portal to make this demo work?

Since now the build is done with dummy macro values related to
AWS_IOT_ENDPOINT, ROOT_CA_CERT_PATH, CLAIM_CERT_PATH, CLAIM_PRIVATE_KEY_PATH, PROVISIONING_TEMPLATE_NAME, DEVICE_SERIAL_NUMBER,I am struck in real values and how to generate them, what to be done on AWS IOT core and AWS IAM user.
Things are confusing when trying to proceed to certificate sections.