My mod supports Minecraft Forge only. It does not support Fabric. Also, if Minecraft crashes, please make sure Forge and the mod are up to date before opening an issue!
If you happen to be using the Curse Forge launcher for running Minecraft, I believe the mod can be automatically installed with it.
After downloading the mod and installing Minecraft Forge, place the mod in your Minecraft installation's mods folder and start Minecraft.
If you don't have Minecraft Forge, install it. After downloading and installing Minecraft Forge, move the mod file to the mods folder of your server.
Make sure you also have the Terrablender mod installed. It can be downloaded here. The Curse Forge launcher should auto-install it for you.