Download the mod itself from CurseForge or Modrinth . These sites scan files for viruses.
When searching for "skachat minecraft" (downloading Minecraft), it is easy to find unofficial or "cracked" sites. To keep your computer safe: skachat minecraft s modom wasteland
Once the mod is installed, you can't just create a standard world. When setting up a new game: Go to . Change the World Type to "Wasteland" . Download the mod itself from CurseForge or Modrinth