Don't use the default fonts. Go to Theme > Customize > Advanced > Page Text . Use Google Fonts pairs. For example:

Check if the footer contains hidden backlinks to the developer's site. Most free versions do; you can remove them (but consider credit).

“The layout is ready,” it whispered in white text against the black. “Now, step inside.”

"Blogger Theme 9" refers to a well-known provider of professionally designed templates for the Blogger (Blogspot) platform. Their guide typically covers the transition from a default layout to a high-performance, SEO-optimized theme Core Setup Guide To get the most out of a BloggerTheme9