Coordinating Colors

Hi! I’ve always had a hard time coordinating or complementing colors, I don’t think I’m color blind, maybe my problem is that I haven’t paid close attention to color families and all that stuff. My friend speaks of cold and hot colors, I’m like: “Huh?!” I know black and white are the easiest to coordinate, but even there you have to be careful. Any methods on how to get better at it? Thank You!