1. Configure A record in wix Advance settings. Refer to link below for step by step details.
    https://support.wix.com/en/article/connecting-a-subdomain-to-an-external-resource-eg-a-blog
  2. Set up Elastic IP and associate address to Private IP. Refer to link below:
    https://dev.to/maybebored/how-to-set-up-a-custom-domain-for-your-ec2-instance-without-using-route53-f9
  3. Check DNS propagation status for your new subdomain
    https://www.whatsmydns.net/#A/chetansachdev.com

Installing LetsEncrypt SSL certificate. Below is a link for bitnami installation.
https://docs.bitnami.com/general/how-to/understand-bncert/