Audacity can’t help with echoes.
Either.
Echoes are a special case where the performer’s voice (as an example) hits the microphone more than once. There is no key or tag to tell Audacity which is the main voice and which is the echo. You are, in effect, asking the software to remove the voice from itself.
This is why we urge, very strongly, to soundproof your room or environment before you try recording your voice.
https://forum.audacityteam.org/t/too-compressed-rejection/52825/22
Do post back if you get some software to work.
Koz