So you ripping the songs from the CD into your iTunes library, the easiest way is to plug your iPod into your computer, so that it appears in iTunes under devices, and select automatic syncing with your main library and it should copy everything in your library to the player.
Or your library size is greater than your iPod, create a playlist with the songs you want, I would do screendumps but my music is spread across a number of computers at the moment.
My shadow's the only one that walks beside me
My shallow heart's the only thing that's beating
Sometimes I wish someone out there will find me
'Til then I walk alone