Ripped CDs wont show up in iTunes library

Question

I've recently got an iPod touch 5th generation, mainly because my MP3 player doesn't have enough space for my music. I've tried looking on the internet but nothing has really helped my situation.
As I found out, you can't sync the iPod with Windows Media Player, which is where all of my music is stored. I found out that you had to download iTunes and then sync all of the songs from there to my iPod. Most of my songs showed up in my iTunes library after installing it (ones that had been converted to MP3 files on the internet for personal use for free via online websites).
When I ripped some CDs to WMP on my computer, I was quite excited that I could have all of my favourite music on my iPod. All of the music that I want on my iPod is in one playlist together, so I thought I could just transfer them to iTunes and then sync them.
After it had finished syncing to my iPod, I noticed that my ripped CD albums had not showed up in my iTunes library and had therefore not been synced to my iPod.
I would really like for these to be put onto my iPod, for that is the whole reason of getting it, not just for the social media.
I have about 4 CDs which I've ripped to WMP that I want on my iPod, but I cannot figure out any way of getting them onto it. They wont show up in my iTunes library but I can't understand why and I've searched the internet for solutions and nothing has helped me.
Does anyone have any ways of helping me add my ripped CDs onto my iPod? I don't want to have to waste money on having to buy them all again from the iTunes store when I already have them in real life.

Answer 1

From iTunes Help:
If you have audio or video files on your computer, you can import them into iTunes so they appear in your iTunes library.
To add media from MusicMatch Jukebox or Audible Manager to your iPod, iPhone, or iPad, you need to first import it into iTunes.
Add items from your computer to your iTunes library
Do either of the following:
Drag a file or folder from the desktop to the iTunes window.If you add a folder, all the files it contains are added to your library.
In iTunes, choose File > Add to Library, locate a file or folder, and click Open.
By default, adding items to your iTunes library places a pointer to each file in the iTunes folder; the original file remains in the current location. For information about copying files to the iTunes folder instead of creating pointers to them, see Change where your iTunes files are stored. If the file is an unprotected WMA file and you have Windows Media Player Series 9 or later installed, iTunes makes a copy of the file and adds it to your iTunes library. The original WMA file remains unchanged. You can’t add protected WMA files or protected WMV files to iTunes.