Divorce and child support related

Hi Sir, 1. I am a NRI right now & have a wife and daughter (born in USA) . We will return to India permanently in Feb 2020. Wife suffers from personality disorder & Psychosis & has been mentally & physically harassing me . In 6 yrs of my marriage i tried hard to make it work, but she has nvr changed. i hv decided to part way but not conveyed her my decision . 2. When i get back to India, do i have to wait for one year to apply for mutual divorce or can i immediately send a legal notice that i want mutual divorce? 3. Will my earnings in USA form a basis for alimony & child support calculation ? 4. My net take away in india is 90,000 per month . How much maximum can be the alimony + child support / month i have to pay ? 5) . Wife's hometown is Mumbai. We got married in Ranchi during 2013 and marriage was registered at ghaziabad in 2015 and our last place of staying together was in Noida (2016) . I want to file for mutual divorce at Noida. Can she object to this and shift the case to Mumbai ? Regards, Narendra Kumar