Your profile is reasonable. Your English is quite good, just not really fluent. You need to raise your price. I just finished the hiring process for an illustrator; I would not have taken you seriously had you applied, because your rate is so low. If you don't think you're worth very much, I'm not going to argue.
In your responses ask questions and talk more about the client and her/his needs than you talk about yourself. Ask questions. They invite answers, and then you're in a dialog, a necessary step if you're going to win the work.