Yes, it is worth learning UI/UX design because these are the best tools to build a product. Generally, UI design helps designers in how to create attractive interfaces whereas UX design helps them in how to provide a smooth experience to users. Even companies are looking for the one who are having these skills. If you are planning to learn these skills then I recommend you to go for the Intellipaat UI UX design course this course is designed in such a way that anyone can learn through basic concepts to advanced level.
For you reference I am attaching this UI/UX free course video offering by Intellipaat -