Please give advice on how much fat should i eat?

Depends: Assuming you are just trying to eat a healthy diet see choosemyplate.Gov this program will track your dietary intake as you plug in foods and tell you what % you are getting in each category. Most important is choosing healthy fats: avocado, nuts, coconut, olives, etc. Avoid trans fats. You may want to talk to your doctor or a nutritionist to help determine the right amount for you.