So. I plan to install the mod "Tough as nails" for Minecraft. Yes, I have the Java Edition. But how does that work? I read somewhere that you should import it, but it didn't show any files.
You can only use the specified mods / modpacks in the Twitch Launcher. (at least I always did it that way)
Depending on whether your mod needs Forge, I would simply get the standard Minecraft Launcher from Mojang (from the homepage) and then either with Forge mod installer or with the respective core mod that the desired mod needs, if he needs one at all.
In twitch launcher at Mods> Minecraft> Create / select profile> more content
There you have all the mods
So I'm now at Minecraft, and there's profile name version and modloader in Create custom profile
Yes, you only need to enter a profile name, which is arbitrary, and the Minecraft version in which you want to play. You leave the modloader or the Götze version.