For the next chord you need two fingers.
Put your index finger on the 2nd string
in the first fret and your middle finger
on the 4th string in the 2nd fret.
F major (gcea tuning)
Note: if you use adf#b tuning, the same chord sounds
a whole note higher, so it is a G major chord then.
On the baritone ukulele with dgbe tuning, this chord
is a C major chord.