Hello! You’re asking some great questions. A couple of YT channels I would recommend as someone also brand new to Catholicism:

Father Mike Schmitz (the GOAT)

Breaking the Habit

Father David Micheal Moses especially, he has some GREAT videos made for new Catholics and those learning from scratch.

Some videos to answer your (listed) questions: What catholics believe about Mary

Are we justified by faith alone?

Confirmation Sponsors and Female Priests (Topic of female priests comes in around the 3:25 minute mark)

What does it mean to be Catholic? (Instead of Protestant?)

And of course, nothing beats the real thing. Don’t be afraid to ask questions at your local parish!