Stat Preview Card Components_Grady

I struggled a lot with the spacing, as well as layering and floating items. How could I simplify/clean-up my CSS. in order to get the desired outcome without spending so much time guessing on sizes and what to float or flex, etc?

Also, I think my HTML is pretty clean, but I am very new to HTML/CSS. Would it be considered legible? If not, how can I make it better?

All comments and help are greatly appreciated!