Virtual private networks (VPNs) typically require you to set up an account in order to access a server's name and address. You will need the VPN's name and address, as well as login credentials, to connect to a VPN.
VPN services usually aren't free, but there are some reliable ones too, such as ProtonVPN, Cyber Ghost or Tunnel Bear. But if you need more security features, then you'll likely have to pay a monthly or yearly fee to continue access to the VPN. Be sure to research your VPN choice thoroughly in order to ensure the host isn't malicious. Many universities have dedicated VPNs for students.