Hello! In order to create your own server in Unturned, you need to download a special server client, which can be found on the official website of the game or on some third-party resources. But if you want the server to be stable and without constant technical problems, I recommend using hosting. For example, you can rent a server from a trusted provider. I recently found a great option for Unturned, and it turned out to be very convenient. You can use this service to quickly launch and manage the server https://godlike.host/unturned-free-server-en/ . This hosting provides access to settings, administration and many other functions, which simplifies the process. So if you want everything to work without any problems, I recommend this option!