You can ssh to your instance with filezilla with this tutorials:
Transfer files securely to Lightsail Linux instances with SFTP
You can also connect to your instance using command prompt. Go into the directory where your private key file locates and enter this command to the window:
ssh -i YOUR_FILE_NAME.pem YOUR_USER__NAME@YOUR_PUBLIC_IP_ADDRESS- YOUR_FILE_NAME: LightsailDefaultKey-eu-west-2
- USERNAME: bitnami for bitnami instance
- YOUR_PUBLIC_IP_ADDRESS: 18.132.231.72
