When you decide to become a freelance writer then you decide to embrace all kind of financial uncertainty and insecurities in life. At first, it is very difficult to earn money because it is not easy to get projects. Well, if you are living in third world country like me then you are even in worse situation. So, how to pass the first years? It is not a wise thing to do your current job until you get some writing opportunities that would bring some money. You have to develop some relationships with some magazines or publishing houses. It is not easy at all.
That is why, it is a good thing that you do not leave everything and become a writer until you find a source that can generate some revenue for you through your writing. This is a big dilemma because then you cannot give time for your writing. If you work in a job until evening then how you can focus on your writing in a tired body. In fact, I have no easy answer to this question except saying that you have to work hard and survive. There is no easy solution.