Accessing public.html on Wordpress

You can configure your Wordpress website using the Wordpress administration page. See instructions to access here: https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-tutorial-launching-and-configuring-wordpress#signing-in-to-the-administration-dashboard.

You can also SSH into your instance to access the Wordpress files. You can either use browser-based SSH or through the terminal.
https://lightsail.aws.amazon.com/ls/docs/en_us/articles/lightsail-how-to-connect-to-your-instance-virtual-private-server.
https://lightsail.aws.amazon.com/ls/docs/en_us/articles/amazon-lightsail-ssh-using-terminal.