Are you self disciplined? This is a big issue, you need to be. Make a plan how you get up in the morning, how your working times will be, what you want to achieve in that day in that week and how you generate your income. If you have done the plan talk to someone, who is really honest with you and knows what he is talking about, if that makes sense.
The danger is that freelancers, especially when its just online work, have the tendency to isolate themselves. And if you quit youre job by an emotional moment, what prevents you from being guided by that emotions in your freelance job?
My advice, which i had to learn and helped me, is to write down a plan and stick with it on a daily/weekly/monthly basis. Thats what all sucessful publisher do. You will also gain confident and trust by achieving the goals in your plan, which will help you further. Good luck