There are already countless resources that do this effectively. Overall I am not an Andrew Ng fan, but his lecture on neural network basics from deeplearning.ai

There are already countless resources that do this effectively. Overall I am not an Andrew Ng fan, but his lecture on neural network basics from deeplearning.ai gets the job done. I'm sure there are other resources that are even better. The video linked here is a pointless exercise. The speaker exclaims that learning formulas and notations isn't needed, but then she dives into an even more confusing code exercise that doesn't explain anything about what gradients are and why we use them. A total waste of time. Just explain the math.