Those equalizer settings are for phonograph records. They won't do you a bit of good.
Can we assume you're trying to fix your voice by itself, and not in the music mix? If you're stuck with the mix, you're dead. Also, you start with the vocal and add the music, not the other way around.
Making vocals come out right is rough. Can you tell what's wrong with it? Can you post a couple of seconds of vocal by itself so we can hear it? People getting into this for the first time make some common mistakes. We can't take out echoes and reverb. Can't be done. We can't remove noise, either, not from a singer. If you're recording in your dining room, it's going to be really rough to make you into Harry Connick, Jr.
If all you have wrong is compression -- loudness changes and instability, you can use one of the fine compressors in Audacity, or the highly regarded Chris's Compressor from here.
Chris's Compressor
http://pdf23ds.net/software/dynamic-compressor/
If you sing off pitch, there is AutoTune, but there are some problems with the Audacity version.
Koz
