Good luck catching up on all 19 MCU movies! ^^' I'm not a big Marvel comic book fan, but I've found the movies quite enjoyable. I think they're at their best when the heroes come together and interact with each other, so they get better by the time you get to the first Avengers movie ;D
Speaking of, I watched Avengers: Infinity War this past weekend. It was breathtaking! the stakes got really high for everyone, and that third act... wow