You can play CubicMC by adding the server in the Minecraft launcher.
On Minecraft Bedrock Edition, open the Minecraft launcher or Minecraft app. Go to the “Servers” tab and press “Add Server.” Enter the CubicMC IP Address play.cubicmc.comin the “Server Address” and the CubicMC port 19132 in the “Port.” Then press “Save” and start playing.