Every fingering that fits a hand
1342
moderate
x876
easy
What is true of it
A♭m is A♭, C♭ and E♭ — 1, b3 and 5 counted from A♭.
On an instrument that cannot reach all 3, the 5 goes first, in that order.
The easiest of the 2 fingerings below is 1342: 4 fingers, held at the 1st fret.
None of them uses an open string, so this chord moves up the neck unchanged — the same shape 1 fret higher is the chord a semitone above.
Where its notes are on the neck
The brass dots are A♭, the root. Everything else is a chord tone with its degree printed in it.
With a different note underneath
A♭m/C♭
434x
A♭m/E♭
x342
An inversion is the same chord with a different note lowest. The name changes to a slash name because the bass is what a listener hears as the foundation.