Is it advisable to read just the notes here and watch videos and read past questions from bpp. Should I also read the materials in ACCA study hub or is it unnecessary?
Certainly the more you read the better, but if you understand everything in our lectures and notes that is sufficient (and use the study hub text for more on anything you are not clear about).
Practice at exam standard questions is essential and so the more questions you practice the better – both those in your BPP book and those in the study hub – as many as you have the time for 🙂