For learning about the doctrines of the Catholic Church, the Catechism is a great place to start. There are also a plethora of different Catholic channels on YouTube that are very informative. My favorite Catholic YouTube channel is Ascension Presents (https://www.youtube.com/@AscensionPresents). There is also a podcast called "The Catechism in a Year" which I highly recommend. It is hosted by Fr. Mike Schmitz who is a fantastic orator, and he makes all of the topics he speaks of very interesting. If you want to know anything else, please feel free to reach out to me. Hope that helped!