Question: I am presently not working, and my job is just to look after my 15 months baby 24/7 which is making me frustrated, and I am staying with my in-laws with the constant whining of my mother-in-law. 

I feel I am not able to find personal time to relax or do what I like to do. Even though I get time to relax when my baby is asleep, I don't feel the time is enough for me to relax. I want to start a hobby or read books but I am unable to find time or, even though I find it, I am not in a state to open a book. I am open for suggestions on what I should do.

Answer: 
Give the kid to the mother in law for a couple of hours per day, getting out of the house if necessary for some alone time. However, you will have to live with the mother in law taking care of the kid her way during those hours.
You could spend a large part of each day with your infant strapped to your back while you pursue any one of hundreds of activities. 

I have seen young women with a baby in a front or back sling happily throwing pots, pruning plants, baking bread, hiking, shopping, and so forth. You could hand out flyers at the mall. Sacagawea Charbonneau explored a quarter of North America with her newborn son on her back; he was 19 mos old by the time she finished. 

Of course you can't do just any old thing. Discouraged activities would include bicycling, rafting, jogging, fencing. Attending a concert or the cinema would be problematical. Grouse shooting is right out. 

The best thing about an active hobby is that your baby will have a great appetite and no trouble sleeping. Also you will be much too tired to give a fig about whatever your mother-in-law has to say about anything.