Here's the deal, chord inversions are basically up to you. If you want to sound like the CD, then there are specific inversions. When we post chords here, it's more or less easy to tell the inversion if u know the notes of the chord.
I would recommend you get very familiar with the concept of chord inversions, then pick out some chorded songs on here and go through and write out what inversions the chords are in.
If u have a sample song, I can walk you through it until u get the hang of it.