Q: how do i find the best chords for my melody
A: just find the harmonies 1 note at a time. go thorugh the entire song and add just 1 note to 1 moment. see if you can find that special moment that really needs it, and find out which note it needs. I'll give you one to get started. "Celebrate good times come on", that party song from the 70s. playing that vocal part all the way through, no band, no harmony, and i have to decide 1 moment to add 1 note. i'm gonna say for "come on", not the first but every 2nd and 4th time of "come on" in the choruses, let's add a maj 3rd above the voc melody. so if the song is in Ab, let's add the C note above "come on", not the first time but the second and 4th time it occurs in the choruses. ok now you pick a song, with just the melody, and pick what you think is the most important spot to add 1 note to. or if you want, you can find another one for the song i did