Is divorce given in India valid if husband resides in foreign country

I got  married on Sep 2015 by Nikah namah and registered in Municipality. We have 1 yr old boybaby and due to a lot of quarrels and fights, she stayed with me less than 2 months and staying in her fathers home and not willing to live with me eventhough i have sent visa and air tickets to stay here(abroad). So applied in India for Talaq now its separation days of 1st Talaq with child under her custody. Now my father in law sent me a black mail letter stating i have to 20 lacs or 30,000/month as alimony or else he will meet in court. I would like to know is the talaq given in the India is valid?and on what basis the court will decied alimony/maintenance charge from me.or do i have to give 25 lacs as per my ex-father in law demand. Currently i am work in abroad as engineer in 2 yrs contract so that the court will calculate based on my current salary.?