Need advise on matrimonial problem

Hi, I got married in Dec'2010 in MP, it was an arrange marriage. I belong to Faridabad. Since my marriage there has been no understanding b/w myself & my wife...we have been continuously having fights/arguments. My wife is ill tempered and impatient. She has left home many a times after our fights. We both have problems with each other.. She has problem with my parents as well. I also have issues with her attitude, arguments and constant instigation and investigation that she does on me. According to her she is always right and I am always wrong. I have tried many a times to resolve things with all the calming efforts. But her parents are less supporting. After marriage I got posted at Bhopal and till 21st June 2012. Post this I have got shifted to Kolkata and she has gone back to her home town i.e. MP, Jabalpur. Since last 1 month we are not staying together and the relationship has come to a stage where I feel we should not stay together and get separated. We didn't have any physical relation from last 1.5 years as the mental torture was so high that planning family was a big question mark. We at present don't have any KIDS as well. I had spoken to local lawyer at Kolkata, who in-turn suggested for AB which I have filed for. 1. I would like to understand where do I need to file divorce case at, Bhopal/Kolkata or the place we got married at i.e. Jabalpur? 2. Will this AB help me in case my wife/her family files for 498a/DV against me? 3. What is the procedure of having mutual settlement and getting divorce? 4. What approximate amount should be negotiated with my wife's family for a settlement and who should initiate the talks? 5. Should I file for Divorce 1st? Thanks