Just run dedicated.bat to start the server. This enables all your Add-Ons so remove the ones you don't want from your Add-Ons folder beforehand. When it says, "Dedicated server is now running", other people can connect to your server. You may see other text in the console, usually when people join the server or what they're saying. Leave this window up to keep the server running.
You can also run Blockland as well, use Query LAN to join your own server. Quitting this copy of Blockland doesn't end the server, only when you close the dedicated console one.
Note that a dedicated server still needs to be port-forwarded for others to be able to join it.