Vocals sound "on top of" instead of "in" mix.

[Trebor]

Ok, I have a “backing track” that I am using to put some vocals over. And since I’m still new to the mixing game, I’m obviously doing something wrong. The vocals sound “on top of” the mix, instead of “in” the mix, if that makes sense.
How can I correct that in Audacity?

AutoDuck the music with the vocal.

[ Steve’s Dynamic-Mirror plugin also does ducking, I find it easier to use than Audcaity’s native AutoDuck ].

Or you could compress the final mix, (the only option if you only have the final mix to work with).

[ Audacity’s native compressor only has one frequency band, multi-band compressors do a better job ].