Here is a chart of some basic fingerings for major, minor and diminished chords. With the chords shown here you should be able to work out how to play the seven scale tone chords in each of the major keys.
The letter name is the only symbol required for a major chord, as demonstrated by the blank grey square above the major chord shapes. Remember that there is always more than one fingering for a chord, so experiment with doubling notes in these chords or re-arranging the order of the notes.
A

A#/Bb

B

C

C#/Db

D

D#/Eb

E

F

F#/Gb

G

G#/Ab

Am

A#/Bbm

Bm

Cm

C#/Dbm

Dm

D#/Ebm

Em

Fm

F#/Gbm

Gm

G#/Abm

Ao

Bo

Co

Do

Eo

Fo

Go
