First things first, you need a bassline. I was waiting for the bass but it never came, I feel like that will make your track 2x better. It does not have to be a 808, it can be something different since you have a smooth jazzy vibe going on. The singing is fine, you don't have to sing like Whitney Houston to make a dope track, you did good. Try throwing in some piano notes in the mix , it might do something else for your track. Keep it up
btw Take some time and check out my tracks