To configure your solution, you shall log into your account first. Do it through SSH. It is a special protocol that allows you to get access to remote servers.
When you just connect to your solution, you can start giving commands to make the needed configurations. Once you get a plan, you will have access to such fields as IP address, your username (root, on default, but it needs to be changed for security reasons), and a password to your root account. Configure the username and password options. Consider changing the default root username because, with it, hackers might use usual brute force attacks to login to your VPS.
After logging into your VPS root account, check whether any updates are ready. If some of them are, you will see a notification about the needed updates. After updating all the components, reboot the server.
Further, enable the Public Key Authentication. This step necessary to create an additional security layer. If this option is enabled, you need a password and a special phrase, a pass-phrase, to login to your server account.
Finally, don’t forget about setting up a good firewall for your VPS solution. There are many reliable options. Select the one that you know and trust. Don’t forget to configure it properly too.