On the Java Edition of Minecraft, click Singleplayer to display a list of Singleplayer maps. Click the Skyblock map. Once the map is copied to the save folder, it will show up in the list of saves on Minecraft. Click the Skyblock map to load it.
To upload, first choose a map type and then select your map file by clicking on the “Upload Map” button. Once uploaded, the map will appear in the preview and you can proceed to fill it with data in the next step, then refine it and finally publish it in the same way as you would with one of our built-in maps Culver's Guest Satisfaction Survey