Start by executing /hole start.
Stop by executing /hole stop.
Change the required money by executing /hole threshold.
Further commands are listed within the plugin.
You have to run into blocks to consume them and get money, the more money you get the bigger your hole gets.
This is a server side plugin only useable between 1.21.1 and 1.21.4, but is playable on EVERY SINGLE VERSION if you use the server side plugins ViaVersion (For newer versions) or ViaBackwards (For earlier versions.) but these are not plugin dependencies, just optional plugins you can use for extra version support.
For a more in depth tutorial, contact me on discord or open an issue from this plugin on Curseforge, for the direct functionality of the plugin, refer to the video by Squeegeeful.
Join the discord for support. https://discord.gg/VAv4Euh3PC
Video Origin: https://www.youtube.com/shorts/Nf7_w8kR6nk