Can anyone tell me and give me some advice how and where to learn how to build premium wordpress themes? Im designer and front end developer with knowledge of html/css and javascript, and also javascript frameworks. But i want to learn how to build wordpress themes. I fund out there is some software named “Underscore”, can i build themes with that? i Found this as well https://www.udemy.com/bootstrap-to-wordpress/ .Can this help me learn wp themes development?
Every advice is welcomed.