For the complete instructions and step by step guide follow the blog post

cd cdk-lightsail-starter and run npm i to install the dependencies

Change the appropriate values and then run cdk deploy to deploy the Lightsail instance.

cd cdktf-lightsail-starter and run npm i to install the dependencies

Change the appropriate values and then run cdktf deploy to deploy the Lightsail instance.

From the resepctive directories run cdk destroy or cdktf destroy