How Do I Use The Program VLC For Handbrake?

I downloaded the program Handbrake and when I convert my DVDs the result is the picture is blocky and the sound is messed up (like watching satalite during a storm) I have the version 8.3 (i think) for Handbrake and I’ve been told that I need to download the program VLC to convert my DVDs onto my iPod. i downloaded the program, what next? how do I incorporate it with Handbrake? I have a feeling that the reason my converted movies are not working because Im not using the VLC player. Any help? Im so frustrated and confused, any help would be GREATLY appreciated.