Hi @Elnar_Finn , welcome to the ODK Community!
ODK Central assumes that you will have web access with a domain name. There is a recent thread that summarizes previous discussions on running ODK Central offline here: Running ODK Central Offline Summary and Questions about Tour Workflow in Remote + BYOD Context
As @joybindroo mentioned, you can spin up an instance of ODK Central without much effort using something like Cloudflare Tunnels or Telebit to test it out. In essence, you would create a tunnel to your machine and use the tunnel’s domain name to install ODK Central on your local machine. There are a million and two tunneling options to choose from.
This will at least allow you to test it out and see how it works. However, if you want to deploy ODK Central in production, you’ll want to have a real domain name and public IP to limit your exposure (and therefore risk) to other services.
You can also sign up for trials on VPS providers, such as Digital Ocean. There may be some that provide credit you can use to just play around or may have a free tier that you can use. They typically require a credit card on file, though.
Best of luck!