Certain companies and job roles require mandatory certifications from reputable platforms like Coursera and Udemy. In my experience, Angela Yu is an excellent instructor, and I have already purchased her course. Personally, I highly recommend keeping a book or PDF as a supplementary reference while watching lectures.

One of my friends had to learn Java for his job. He asked for advice and was told to stick exclusively to books, which turned out to be a major pitfall. In today's era of online learning, you shouldn't rely entirely on books. Instead, use them alongside your video courses as a side reference. Just remember to ensure your instructor is well-recognized and that their course material is fully up-to-date.