Hi Nicolo,
I’m glad it helped you. This compilation is basically everything I studied to pass in the Scrum Master exam :)

I’m currently planning to start the Product Owner certification preparation. I know Scrum.org suggests to use the same Scrum Guide and they also offer the quiz training. I saw some schools like Scrum Alliance offer the training but I’m planning to study by myself. As soon I get the certification this year, I’ll definitely share my studying material. I’ll keep you posted!