i just downloaded audiacity because i need to slow down a song for my guitar teacher and i imported it and tried to play it and it's as if it just fastforwards through the whole thing and makes a kinda screeching noise for a couple of seconds. also, i did google it and some people say if you click "effect" then "change tempo" you can change the speed of the song but when click it, it is shaded gray and wont let me click.

if anyone can help i would be grateful