Done BE,confused in choosing the SAP module

Hi,

I have completed my B.E in Computer Science (2013).For last one year I was looking for the job but I was unable to find.

So,I decided to go in designing field.I have done PHP and also buid a job portal website "www.indiajobsalert.com".

Since,the chances of growth in this field is very less.I decided to go for SAP.

Since, I am much confused about SAP and which module I should choose according to career point of view.

So,please suggest,which module I should go for and why?

Thanks