How much will be the alimony if she demands ?

We have been married for 18 months , my age is 32 and my wife’s age is 30. My educational qualification is diploma and my wife is MA history and unemployed .As I am working in ship , my job is based only on contracts provided by shipping company ,contract duration is 9 months and salary is 1,20,000 per month . I don’t have any properties on my name and I have LIC insurance policy of 80,000premium per year .other than that my net bank balance is 5 L . All of my marriage expenses was taken care by me .During my holidays I won’t get any salary . I will take next 4-5 months holiday before signing next contract. if I don’t report to my office after my holiday(4-5months) ,I will not get any contract and considered as jobless . Me and my wife had little argument in financial matter and she tried to leave house taking my gold chain and rings worth of 5.5 lakhs and But I didn’t let her go .After that her uncle came to my house to discuss the issues and after discussion ,her uncle proposes that my wife wants to visit her parent , saying she will return to my house ( rental home In which we are staying )after 2 days . Agreed to that ,I allowed her (with gold chain and rings ) . After few days her relatives of 4 people came to me , saying she demands to deposit my salary in her account and she will take care of expenses of all things which I did not agree , and “ I will send only required amount for home expenses and to her needs” for which they did not agree. After a brief argument ,they asked to leave the rental home which is because the rental contract is in my wife’s name . And I didn’t want to argue with them and I left the house . Now I am staying with my mother In her home .Am mentally frustrated by my wife and her relatives action. Can she ask for any maintenance or alimony and how long she can ask for maintenance ? And if she wants a divorce and asks for lump sum amount , how much is the maximum amount? for your information, I have a poor background whereas my wife have richer background.if she files a complaint against me , Which restricts me with my job , I can’t work and become jobless .please help me And suggest what should I do ! Thanks in advance