Hi I want to earn money by photography

SO do a lot of people. But what do you plan to do about it? Take classes... learn something about the subject. Its easy to take photos. It takes a lot of know-how to take GOOD ones.

One thing that you are going to have to figure out as nobody can do for you is that you need to know your passion. If you can pass your passion into a print then you can make money with it. But if its just a job your never going to make it.

You can have an eye for it... you can have a passion for it... but if you can't sell yourself too... it will never be more than an expensive hobby. Learning what to do and having a aptitude for it is only part of the struggle just to make enough to break even, much less make enough to live on or become wealthy doing.