Making a design, writing, and any thing else creative always involves a shitty first draft. Making use of a shitty first draft involves getting all of your ideas down in one sitting and not editing as you go. This allows you to get the initial design done quicker and getting all the idea down without missing any. From here the design can easily be edited and polished into a perfected final product.
https://uxdesign.cc/embracing-shitty-first-drafts-d34c427b9509