The F# minor chord is one of the more difficult minor chords to play because it requires you to perform a barre with your index finger. The F# minor chord contains the notes:
F# - A - C#
and the basic fingering is:
So how do you go about fingering this? Take your first finger and lay it across all 6 strings on the 2nd fret. Now place your 3rd and 4th fingers in the appropriate places according to the diagram. Try strumming it. It's OK if some notes don't ring. That's natural. Play along with the example below to get used to how it sounds and how it feels under your fingers.