How to fix too bright/thin vocals?

Hi guys, Im a male singer inspired by lana del rey from a very third world country so I barely have any resources. I recorded these vocals om my samsung s23 and edited them in fl studio in my potato pc. I followed a tutorial to get that lana vocal sound

https://youtu.be/qyMuFSUDRNg

this video.

And while I dont think the overall song sounds bad. I feel like its too thin or bright and it gets like shadowed by the instrumental when the track gets louder and it goes into the background yk? How do I fix this?

https://on.soundcloud.com/H074fBYYMw3k9XFGoI