Is there a demand here for English for Turkish Learners in A1 Level? Is there a demand for Turkish for Foreigner?
Try searching on Udemy's marketplace insights
https://www.udemy.com/instructor/marketplace-insights/?srsltid=AfmBOooUhQYjuAjItLPh15sWKD245dqge8LUNNPeJOyZoAsEIdo_OfFA
You can also search for this topic on Udemy and see how many results you get.
Good luck!