İngilizceniz varsa Alecaddd'ı tavsiye ederim:

WP 101 for Beginners: https://www.youtube.com/playlist?list=PLriKzYyLb28nUFbe0Y9d-19uVkOnhYxFE

Create a Premium WordPress Theme: https://www.youtube.com/playlist?list=PLriKzYyLb28kpEnFFi9_vJWPf5-_7d3rX

Eklenti geliştirme: https://www.youtube.com/playlist?list=PLriKzYyLb28kR_CPMz8uierDWC2y3znI2