Ok, so I figured something out. When I make a new comp based off the audio track I'm using it works perfectly fine! but when I add in clips I can't see them at all, besides a little dot in the preview screen. Also when I do this it makes the framerate 30, which is fine but when I add it in with clips already in the comp it is 120, I tried fixing it by making it 3o fps but then the audio is just really slow. Does anyone know?
Finally found a solution for now! What I did was when starting AE you click "make new comp from footage" in the second window. I then loaded my .mp3 into that and created a new comp. This should playthrough with no issues. I then changed the resolution in the Comp Settings to the resolution of my clips (1920x1080). I then imported my clips and it works! I don't know why I had to do all this just to play an mp3 file but I guess it works. Note I'm importing 120 fps clips into a 30 fps comp.