To get divorce after 3 yrs of marriage

I am married for last 3 yrs and have a son aged 1 year.Me and my wife has an age gap of around 6-7 yrs.Itz an arrange marriage.Though we started properly,from first month itself I understood that my wife is hardly interested in my family members which consist of only my parents and younger sister who is married off and stay apart.Though there is no one to take care off much,my wife failed in fulfilling her duties.She is self obsessed and interested only in her maternal family.I tried a lot to make her understand our family values but in vain.My amma counselled her many times and tried to make her comfortable but of no use.Even at the time of delivery,it was my mom who helped and stayed with her all time. There's too much interference from her family side.But now she has crossed all limits and brought my mother to death bed after having a big fight in 2-4 months of my dad's demise.this has shackened me and disappointed completely.I can't stay with such a lady who don't know any house chore plus her behavior is also beyond my tolerance.Can you suggest how to proceed ahead.Shez not working and don't hv a proper degree yo show up