If you want to make a comic in Illustrator, there are a few things you need to do. Firstly, you will need to create a document in Illustrator with the same dimensions as your finished comic book art. You will also need to create a layout in Illustrator, which will determine the positioning of your panels and images. Once you have your layout created, you will need to start drawing your panels. Each panel will need to be filled with a different image, and each image will need to have a unique width and height. You will also need to create a text box for your dialogue, and you will need to position it where you want it in your comic book.
Once you have finished drawing your panels, you will need to create a background for each panel and add text to the text box. You will also need to create a frame around each panel and add it to your document. Finally, you will need to save your document as a .ai file, and you will need to export your comic book as a .pdf file.