Open converter (which also serves as CD ripper) by clicking on the Main menu button in the top left corner of the main window and selecting Rip…

Select your optical drive from the list of devices on the left and the list of tracks for the inserted CD should appear on the right:

Step 3 and next steps are essentially the same as for converting audio files in this tutorial. The only difference, you are actually converting CD tracks to audio files, not audio files from one format to another.