I am married to a Russian citizen and we want a divorce in Bangalore

I am an Indian citizen and am married to a Russian citizen as per Indian laws and we want a divorce. She wishes to go back to her country immediately. We have a daughter. She is ready to leave the child with me. We have irreconcilable differences about religion, culture, lifestyle etc. So there is no hope of the marriage becoming fine. She wants to go to Russia even before the divorce is approved by the court. Can we get a divorce immediately. Whom should we approach ? What is the process and the cost and time involved ? Can we file for divorce and can she then go away and will the divorce be given exparte ? How much time will this take ? Please help with this since she also will be going back to her country and may get married in future and I too might need to get married in future to take care of the child. She is also a person who has mental issues and obsessions and compulsive behavior and this was evaluated by doctors in NIMHANS. All in all it is a hard thing for me to stay with her and I also feel that it is detrimental to the interest of the child to be with her too. Her family background is also bad, not just financially but also in terms of ethics and mental & emotional stability. So, even though I was earlier thinking of giving the child to her, I realised that it is a dangerous move to do so. Please advise. Thank you.