Hi Imran.....as Kev thought in his post, I’m guessing around one year old.
As Nigel says - and I’m guessing you may have been holding him like that to try to get the photo...... it’s important to be very careful and not put pressure on a birds chest, as unlike mammals they do not have a diaphragm and pressure could damage the complex system of air sacs..... I haven’t read in depth the text I’m linking to as just grabbed something from a quick search, but the photos in the attached explain...
http://www.avianwelfare.org/shelters/pdf/NBD_shelters_parrots.pdf
Ideally just get your bird to step onto you and have him sit just as he would do if he was on his perch.