Add an image in illustrator. There are many ways to create vector graphics through illustrator one way is to start with the type tool.
image source https://commons.wikimedia.org/wiki/File:English,_Illustration_to_a_poem_by_poe_published_1900_-_vectorized_using_Adobe_Illustrator.svg
image source https://graphicdesign.stackexchange.com/questions/98806/how-to-vectorize-a-graph-from-a-raster-image
image source https://9dkid.wordpress.com/2010/09/27/3d-render-to-vector-a-design-process-with-adobe-illustrator/