I have completed PGDBA from welingkar in General management now I want to learn SIX Sigma or PMP what are my options and which institute.

I am working professional I have completed PGDBA from welingkar in General management, Mumbai. My quiestion is does is hold any value ? and also I want to SIX Sigma or PMP what are my options and which is the best instutute. I have been working for more than 4 years in a BPO.