You can play NebulaMC | Skyblock 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 NebulaMC | Skyblock IP Address play.nebulamc.orgin the “Server Address” and the NebulaMC | Skyblock port 19132 in the “Port.” Then press “Save” and start playing.