Even if you don’t consider yourself an artistic person (like me). I still believe you are able to develop a good scheme, because you’ve probably encountered situations where you’ve had to select colors for something. (For example, when you get dressed for the day or when you are decorating for a holiday.)
See the pictures below:
Complementary colors are any two colors opposite each other on the wheel. For example, blue and orange, or red and green.
Analogous colors are any three colors next to each other on the wheel. For example, orange, yellow-orange, and yellow.
Triadic colors are any three colors that are equally apart on the color wheel. For example, red, yellow and blue.
Split complementary colors use three colors. The scheme takes one color and matches it with the two colors adjacent to its complementary color. For example, blue, yellow-orange and red-orange.
Tetradic or double complementary colors uses four colors together, in the form of two sets of complementary colors. For example, blue and orange is paired with yellow and violet.