Fix Server Issue for AWS Lightsail Bitnami Wordpress Instance after DDOS Attack

I have an Amazon Web Services (AWS) Lightsail Bitnami Wordpress instance that recently experienced a DDOS attack. I am looking for an experienced freelancer to help me diagnose and fix the issue with the server. It requires a network configuration fix and doesn't require any configuration changes to other installed components. I have remote access to the instance that can be used for the fix.