Yes. The Avatar comics provide more depth and exploration of the world and characters. They've been well-received by fans who want to immerse themselves further in the Avatar world.
No, Avatar is not a comic book. It originated as a highly successful animated film and later expanded into various related media, but not in the form of a traditional comic book.
Some libraries might have physical or digital copies of the Avatar: The Last Airbender comic. You could check with your local library. Also, some official comic book stores might stock it.
The official website of Avatar: The Last Airbender might have links or information on where to read the comic. Additionally, you can search on major online bookstores such as Amazon or Barnes & Noble.
One place you could look is on official comic book publisher websites. Sometimes they offer digital reading options for their titles, including Avatar comics.