I do think that Attack on Titan is great for beginners. As I mentioned at the beginning, this was a first for me in many ways, despite being an anime fan for decades prior to this. While I did read manga occasionally, mostly stuff like Naruto and Pokemon, I mainly watched anime. Attack on Titan was the first anime that I ever watched as it was airing week-to-week, and it was great for that. It was also the first manga that I ever read ongoing as it was coming out and it was excellent for that, too. I think that the dark and serious story was quite different at the time and more Western-feeling in some ways. I have it to thank for my love of manga now.