Wine is complicated, but knowing more about what you're drinking increases the pleasure. If you want a better appreciation and understanding of what you're drinking, this infographic from Wine Investment is a great tool.
The image doesn't overwhelm you with detail, but it gives you a sense of what colours to look for, what glasses to use, and what various terms mean. I particularly enjoyed the spoked presentation of various aromas you might smell. The full graphic (linked below) is quite detailed; Business Insider has a useful walkthrough of it.