I Am 19 Years Old With An Height Of 5.3

I am 19 years old with an height of 5.3 which is very tiny. My weight is 94.7. I started gyming 1.5 months before and now its 92.3 . I am fed up of my chest looks more than a breast. I want to know is to do exercises and lose weight will also decrease my chest becuase i have seen a lot of people who are chubby but their chest are normal i dont know please help