I'd recommend 'The Adventures of Tintin' for beginners. These graphic novels have been around for a long time and are full of exciting adventures around the world. The characters are well - defined and the stories are accessible. Also, 'Big Nate' is quite suitable. It's a humorous take on school life and the antics of a young boy, with fun illustrations that will appeal to those new to graphic novels.
Beginner - friendly English graphic novels include 'Archie' comics. They have a long - standing tradition and are centered around the everyday lives and romances of a group of teenagers. It's light - hearted and easy to understand. 'Calvin and Hobbes' collections are also excellent. The relationship between the boy Calvin and his stuffed tiger Hobbes is both funny and heartwarming, and the strips are a great introduction to the medium.