I don’t know of any audacity tools that can remove echos. Also, when editing, it is always best to start with a .WAV file when you can.
Having said, that, I did a google search on “how to remove echo from audio in audacity” and came across this YouTube video entitled, “how to remove echo sound and wind sound in audacity”, by Tulsiram Tech. Following the instructions in the video, I came up with this recording (see attachment), which, unlike the video, seems to be more intelligible.
Before you make any more recordings with your PC, check that all microphone enhancements are turned off:
https://manual.audacityteam.org/man/windows_accessing_the_windows_sound_controls.html#:~:text=Look%20for%20and%20turn%20off,you%20can%20disable%20all%20effects.