To reboot your instance, click in the left menu on Instance and then on the button Reboot top right.
To restart a service like NGINX, MySQL, or PHP-FPM, click in the left menu on Instance and select the Service to restart.
For connecting via FTP you need to enter the Instance IP in the field MasqueradeAddress.
The MasqueradeAddress causes the instance to display the network information for the specified IP address or DNS hostname to the client, on the assumption that the IP address or DNS host is acting as a NAT gateway or port forwarder for the instance.
The timezone of your instance is essential for executing cron jobs and other scheduled tasks at the right time in your region.
Reboot the instance after changing the instance that all services are aware of the timezone change.