I think you have a really good start here. Here are my suggestions that you may take or discard as I am not a pro.
1-the song's total volume was very low. I had to turn up my monitors' volume a lot. Note that I always set my songs' volume to -3dB.
2-I thought the backing tracks could come up in volume to make a better mix
3-your vocal was very good
4-the synth vocal was not convincing BUT it was very good considering it was your first attempt at using a synth vocal. I do not have any synth voices so I can not suggest anything on improving them.
5-great lyrics

I think this song has a ton of potential.

Note those were just my suggestions and other may or may not agree.

Doc-take it easy John this is just a sharp scalpel. It will not cut deep so don't worry.
Me-I'm not John
Doc-I know, I am!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware