"Choose inspiration pictures of people with your same skin and hair color."
When it comes to makeup, inspiration from someone with your same skin tone helps you actually see how the colors and textures will look on your own face. The exact same lipstick or blush can read completely differently on different skin tones.
For hair, the color plays a big role in how we choose our technique to get certain textures and finishes. A braid, for example, will never look quite the same on blonde highlights as it does on jet-black hair.