You’ve already earned many large-Muslim/Ottoman-region and Middle Eastern successes (Shahanshah, KHAAAAAAN, This is Persia!, The Great Khan); focusing on Anatolian/nearby Turkic starts (Karaman, Candar, Aq Qoyunlu) leverages your regional strength and similar mechanics while offering a mix of doable expansion, vassal/subject play and early diplomatic/war challenges that fit your experience.