want divorce from my wife. Please help me

I want to share with all of you. My wife is my old girlfriend. in the last year April 2019 she file a rape case against me and force me to marry with her. and That time i was have no other option and finally we got married on June and i was in the prison for 2 months because of rape case. but i was not happy with all this. she belongs to Muslim religion and i am belongs to hindi family. but now after 6 month she starting bleming me about my extra affair and police threaten. i dont want to live with her anymore. and also we have no kid. Please guide me how i can get divorce from her.