Question

Noah who draws comic books in his free time wants to write a graphic novel.

Answer 1

“Noah, who draws comic books in his free time, wants to write a graphic novel.” This is because you are adding a little background knowledge about Noah that is not especially important to the topic. You could easily say “Noah wants to write a graphic novel” and need no punctuation but when you are adding “who draws comic books in his free time” you need two commas.

Answer 2

Answer:

Noah, who draws comic books in his free time, wants to write a graphic novel.