I really want to use mods so I googled how to download then and stuff so I downloaded forge but I can't get into it. It keeps saying "There is no Minecraft directory set up. Either choose an alternative, or run the Minecraft launcher to create one." And I'm very confused because I'm not really a tech kinda person so I have no idea what the directory is, what the launcher is, or how to fix any of this. Will I get a bug or virus? How do I fix it?