The six-string E minor shape barred at the nut.
Index finger barres all six strings at the 1st fret
Load F Minor (Fm) onto an interactive fretboard, hear every note, and build it into a progression.
Play Fm in the Studio →A F Minor (Fm) chord contains the notes F, C, G#. It is built from the minor formula 1 - ♭3 - 5, with F as the root.
One note. The A in F major drops a semitone to A♭, which on this shape means lifting the finger off the third string and letting the barre cover it instead. Everything else — the barre, the root, the two fretted bass notes — stays put, which makes the pair a useful way to hear what a flattened third actually does.