Unfortunately for me you arrived in italki too late, you need to be a bit more business like at the end of your English introduction to gain more interest. The written part of you English profile could be expanded to include words and phrases like "I enjoy teaching" "I can asses your Turkish level and recommend the best course for you" "I will quickly asses your weaknesses" "Whatever style of teaching you prefer, I can work with you"
You need too include a little more than just PDF's etc, you need to tell the students you will find extra materials from various sources to help them with their weaknesses.
Your English is good and I know that you speak the correct Turkish accent that is recommended by the Turkish ? ( I forgot the name) TDK ?, In all new ventures it takes a while to get the first customer, in this case a student.
To get all new ventures of the ground you have to advertise a lot until eventually and gradually word of mouth means you do not have to advertise so often.
I wish you well.
There is a problem that you have to make a decision about, do you charge the normal rate or hope to get more regular customers by being cheaper. Or having fewer customers but with gaps in between when you are not busy. Remember sometimes it is easier to reduce prices than it is too increase them. Also sometimes it is possible to be too cheap and people think the product cannot be good, when this happens increasing the price of the product sometimes brings more customers.
Once you attract that first customer things will improve. There has been an increase in Turkish teachers here because of the global situation.