When the installation is complete, you should connect by the public IP without a problem; if not, which installation process have you followed?
If you want to connect via SSH, you can follow this guide https://docs.bitnami.com/aws/faq/#how-to-connect-to-the-server-through-ssh
I hope this information is useful for you. If you have any other question, please do not hesitate to let us know.
Carlos R. Hernández