You can play NexusMC 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 NexusMC IP Address mc.nexusmc.worldin the “Server Address” and the NexusMC port 19132 in the “Port.” Then press “Save” and start playing.