Inversions are easy. To invert a chord take the bottom note and move it to the top and vice versa. Here is an example:
C major chord:
C-E-G root position
E-G-C 1st inversion (C moves from bottom to top)
G-C-E 2nd inversion (E moves from bottom to top)
C-E-G root position (G moves from bottom to top)
You get the picture? You can also do that with 4 and 5 finger chords. Here is another example:
C7 chord:
C-E-G-Bb root position
E-G-Bb-C 1st inversion (C moves from bottom to top)
G-Bb-C-E 2nd inversion (E moves from bottom to top)
Bb-C-E-G 3rd inverison (G moves from bottom to top)
C-E-G-Bb root position (Bb moves from bottom to top)
I don't have a good 5 finger chord to show, but it goes up to the 4th inversion, see how easy inversions are? Each one sounds different, but the chord is the same.