Configuring AWS Amplify Resources for Amazon Rekognition FaceLiveness API - Step 1

If you want to sell Rekonition functionality you must make a better tutorial than explain step by step for people who do not work with AWS. You need to show that AWS is not hard. I tried all 3 tutorial videos and do not understand how to launch the backend side (Lambda, Gateway)

I am doing the implementation of the sdk, the idea is not to use a front-end but use only the back-end and send the videos from a s3 bucket, but I have many problems trying to implement the "startFaceLivenessSession" I do not know if in the next part explain or show how to pass the videos. thank you very much, I am attentive to your response.

the step number is wrong