If you need to get a student visa, you must apply to a Turkish Consulate, generally the one nearest your place of residence.
You are recommended to apply for your visa as soon as you receive your acceptance letter, which is issued by Yalova University. The process of applying for your visa for Turkey varies depending on your country of residence.
Please check the relevant website for information about your visa status: https://www.konsolosluk.gov.tr/ekonsolosluk/default
Foreigners who intend to study in Turkey must apply for a residence permit from the nearest local police station immediately upon their arrival in Turkey regardless of the validity of their visa.