Translucent Dream Theme – Adding Background

A friend suggested putting a light gray or tan background graphic in the text of my blog to keep it from looking so stark. He uses little subtle squares that don’t interfere with the text, but take the glare off of the screen. My blog address is https://www.gods3x5.com. Do you have any ideas on if this is possible, and how I would do it. I’m a beginner and so not very technical on the mechanics of the site.

Thanks for the help.