I’ve compiled a bunch of questions relating to matrix calculus, if would like to practice solving backpropagation. You can access the PDF here: https://forbo7.github.io/misc/matrix_calculus_practice.pdf
Do let me know of any corrections or improvements!
The questions are based off of the The Matrix Calculus You Need For Deep Learning paper, which I also highly recommend going through if you would like a more intuitive understanding of backpropagation and be able to solve it yourself.