To get started with CrazyCrates, you first must have a server up-and-running with software like SpigotMC, PaperMC or something that supports plugins. You can find a guide here to setup a server.
Next, make sure you have already downloaded CrazyCrates from the spigot page and dropped it in your
/plugins folder. Make sure to restart your server so the plugin can generate the proper files for us to make crates and edit rewards.
Verify CrazyCrates is installed by typing
/version crazycrates and compare to see if the version is the latest from SpigotMC.