>>128348247
Forget all of it.
Find your mixer window of your DAW and play your song while looking at them.
Don't listen with your ears, listen with your 'eyes'.
What do those bars do? What values do they hit?
Do any of them go redline to the top?
Usually the separate one to the far right will be your master (all tracks together).
This need no plugins, the MIX tab with the meters is part of any daw.