I'm speaking about this subject on conferences, but here is a list of some good resources:
https://github.com/kamranahmedse/design-patterns-for-humans https://sourcemaking.com/design_patterns https://www.youtube.com/watch?v=v9ejT8FO-7I&list=PLrhzvIcii6GNjpARdnO4ueTUAVR9eMBpc
Let me know if you have specific questions ;)