That is a pretty arrangement. Putting a vocal melody on that should be extremely easy once you write the words.

With vocals, you should have structure in the song.... Defined verses and choruses that are the same musically, each time they appear. I heard an outlier chord in there that was brilliant.... However, unless you repeat it in the song according to the structure it doesn't work well. However, that outlier chord could be used easily and to great effect in a bridge, and just used once.

This is a good start to what can easily be a beautiful song when completed.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.