What would you recommend for a complete beginner? I found these lectures that have helped me start sketching out the field in my mind, but it's still difficult: https://www.davidsilver.uk/teaching/
David Silver's lectures are on reinforcement learning which is different from deep learning; I definitely wouldn't start there. One good starter book is Hands-On ML by Aurelien Geron - https://learning.oreilly.com/library/view/hands-on-machine-l... but there's tonnes of others (and the recommendations will kind of vary based on your background).