correcting and recording music

Having a device like BOSS BR 600, 8 tracks, a quit powerful stereo microphone, enough loops COSM, rhythm patterns= you are 100% ready to sing and play a song you have composed.
The song is recorded on a CF card, and finally happy as a child, you are able to see and hear your artistic effort.
So far so good. I sing lalala low, the same lala a little bit higher, and finally again higher.
SO YOUR FIRST SONG IS ON YOUR PC, YOU CAN HEAR YOUR RESULT.

Conclusion: you are absolutely not satisfied, because you want the song to be perfect, as it is in your head.
QUESTION: having the song on your PC, what is the most perfect program to take away pieces where your voice is false, there is also a delay between your guitar and your singing. You also discover that at least on a 3 minute song, 1 minute that you are singing completely out of tune.
I know, that there are programs for PC (windows) where you have the possibility to duplicate your voice, resulting in a little choir, ion the very same program you are able to see the different soundwaves, and I saw it 5 years ago, you HAVE to manipulate and correct some things, like a guitar chord, sounding to high, or a false note, same with your "singing skill?". Are there chordians who have the right software to create the "perfect song", by cutting the ugly pieces out of that song, and paste them after correcting. There are programs like protools, and probably a lot more.
Since I am absolutely not a professional, is it possible to have some names of software programs who allows you to "manipulate your song", by cutting, changing the bad pieces, to put your voice 1 or 2 semitones higher, removing AND if possible replacing, JUST WORKING OR USING that software program, sitting in front of your PC. It is also able to make you sing like a woman, or a soprano.
Please I know a few names, cubase, protools, but I need more a very decent and not to complicated program, to correct, take away your mistakes, and change them, still sitting in front of your PC, into decent and matching pieces.