Minecraft 1.7.5 Mod Downloading

I have Minecraft 1.7.5. I'm trying to download a mod called the Twilight Forest, it seems to be a pretty popular mod and I have done scans on it and the files are safe. Now this is where I get lost. I have watched several different youtube tutorials and read a few wikihows on how to successfully download and install mods but no matter how many times I try to it does not work.

The last video I watched told me that downloading mods for 1.7.5 is the same as 1.6.1 or higher, but I do not think that is correct, I followed the steps correctly as shown in the video and the results seemed to be the same as the video tutorial, BUT when I went into the world nothing happened, the mod didn't work. I didn't even get a glitch or a crash like I was expecting.

I'm using WinRAR to transfer the files like everyone else says to do, I do have the real version of Minecraft that I paid for, so no bootlegging was done (that also means I have the required forge 10.12.32blahblahblah). I realize that mods are not supported by the creators of the game and they may cause issues for me later on, but this is very important. I have no explanation for my desire to play in this crazy new Minecraft dimension, but if anyone out there can give me a hand please, please, please respond to this.

Any advice at all will help, don't be shy. Let's try to figure out these modifications together.

1. Make sure your mod has the same version as the forge file.
2. Put the mods in the mods folder (the mods folder is in your minecraft folder).
3. If there's no mods folder create one called mods.
4. Play your newly downloaded mod (unless your game gets corrupted and you have to re-download minecraft (yes the whole game so make a backup folder containing your worlds just in case.