If you can sight-read AND you are musical enough to hit those notes to a backing, charting the melody may be of help to you. And it may be a help in setting the pitch correction software, too.

Instead, I'd suggest simply practicing. You'll have to at least be able to hear in your head where the melody is going, and if you can do that, then vocalize it (words and all) to your backing. Do that as many times as you need to, BUT do it away from the microphone.

Once you do record a take, then record another one. Don't stop for "wrong" notes...only if you screw up the lyric or timing. You may even want to record one, two, or three more. When you have, you'll have a selection of takes from which you can choose in DAW your best phrases, words, verses, etc. Stitch those together for your master vocal. This should limit the number of"notes" that might need major pitch correction. These are the ones you should concentrate on in pitch correction and not (hopefully) the entire vocal.

If you still want/need to run pitch correction over the entire vocal, render the above track to a new base-track and apply PC to that one.

Few people hate to record their own vocals more than me, but this is the "shortcut" that works best both in results and in time saved, not the technology.

It's good that melodyne had you assigned to the right key, but it's your own ears that should be telling you if you are flat, sharp, or completely off the melody "in your head" that you've been practicing. I don't have melodyne, but if it doesn't let you hear what is being corrected in real-time, then I don't know what to tell you...except that I wouldn't want it.

BIAB 2021 Audiophile. Windows 10 64bit. Songwriter, lyricist, composer(?) loving all styles. Some pre-BIAB music from Farfetched Tangmo Band's first CD. https://alonetone.com/tangmo/playlists/close-to-the-ground