Headings are a perfect way to capture the attention of your readers. It allows them to have a quick overview of the contents before reading into the sub-text
There are plenty of ways to make text stand out in Google Docs. You can use a specific font style, formatting, or highlight text with color. Another option is to add borders or shading to your paragraphs.
Affinity Designer is a pro-level competitor of Adobe Illustrator, but one with no subscription required. It's full-featured and fast, but it can't match Illustrator’s ease of use, however.