This video shows how darts are made on custom patterns.
You can alter standard patterns a similar way.
''Explanation of Darts and How to Sew Them''https://www.youtube.com/watch?v=mlC0oUVD_To
Try a pattern with french darts.
It's a long dart that starts where a normal dart does and extends down at angle towards waist/hip.
These are some simpler dress patterns to learn darts (available in US).
New Look #6342 has bust darts, sleeves, sleeveless
New Look #6145 has bust darts, waist darts, sleeves, sleeveless
KwikSew #K3598 has bust darts only, sleeveless
KwikSew #K3704 has french darts and waist darts, short & long sleeve
Remember, undergarments matter when you're measuring.
It's the darts on the ready made dresses that often make K's dresses ill-fitting. Buying a petite size for the hip and length measurement when the body height is not petite sizing will cause the fitting darts to be in the wrong places at shoulder, bust, waist and hip. This has been evident in many recent dresses on K.