Firstly I would like to congratulate you on your choice of instrument and your choice of song, playing pop songs on unusual or rare instruments is a double thumbs up from me.
As I'm sure you know, there are several different lyres in the world and often with names unique to their country as the instrument spread out from Ancient Greece and took its place in various cultures.
As such, I do not know what type of lyre you have or its tuning, but I will assume it is an Anglo-Saxon six string lyre in C, and tuned to a standard diatonic major tuning: C-D-E-F-G-A.
The chords for Baby by Justin Bieber can be found on Ultimate Guitar here (tabs.ultimate-guitar.com/j/justin_bieber/baby_acoustic_crd.h) and involve four chords C, Am, F and G.
If you lyre is set up as described above then to make a C major chord place the fingers of your left hand thusly o - X - o - X - o - X, where o represents an open string and X a blocked string, when looking at the face of the instrument. You will be leaving C, E, and G open which are the notes of a C major chord. Strum with your other hand or pick and you should get that note.
For A minor you need o - X - o - X - X - o
For F you require o - X - X - o - X - o
While for G you want X - o - X - X - o - X
I hope this helps and upload it to YouTube when you have it nailed down, it'd love to hear it.
As I'm sure you know, there are several different lyres in the world and often with names unique to their country as the instrument spread out from Ancient Greece and took its place in various cultures.
As such, I do not know what type of lyre you have or its tuning, but I will assume it is an Anglo-Saxon six string lyre in C, and tuned to a standard diatonic major tuning: C-D-E-F-G-A.
The chords for Baby by Justin Bieber can be found on Ultimate Guitar here (tabs.ultimate-guitar.com/j/justin_bieber/baby_acoustic_crd.h) and involve four chords C, Am, F and G.
If you lyre is set up as described above then to make a C major chord place the fingers of your left hand thusly o - X - o - X - o - X, where o represents an open string and X a blocked string, when looking at the face of the instrument. You will be leaving C, E, and G open which are the notes of a C major chord. Strum with your other hand or pick and you should get that note.
For A minor you need o - X - o - X - X - o
For F you require o - X - X - o - X - o
While for G you want X - o - X - X - o - X
I hope this helps and upload it to YouTube when you have it nailed down, it'd love to hear it.