You can play Valyrian Network by adding the server in the Minecraft launcher.
On Minecraft Java Edition, open the Minecraft launcher. Click “Multiplayer” and then “Add Server” and enter the Valyrian Network IP Address play.valyriannetwork.com in the “Server Address”. Then press “Done” and start playing.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the Valyrian Network IP Address play.valyriannetwork.comin the “Server Address” and the Valyrian Network port 8157 in the “Port.” Then press “Save” and start playing.