Give the sky a scale.
Include a roofline, a tree or a small part of the landscape. That familiar shape makes the space above it feel larger. Then take a second photograph with only sky in the frame.
One subject. Three ways of seeing.
Follow the brightness.
Tap different parts of the scene on your phone and watch how the image changes. Make one picture that keeps detail in the bright clouds, and another that favors the darker foreground.
Wait for a new shape.
Choose one framing and return to it a few minutes later. Look at the spaces between clouds as well as the clouds themselves. A short sequence can be more interesting than a single dramatic shot.
Keep your attention on your surroundings while taking pictures. These are creative exercises, not a guide to weather conditions.