"I don't know what to draw..."
These are some of the things that budding artist struggle with when designing artwork. Here is some ideas that you can start off with. Remember: not all art is 'pretty'...
1. Draw a vase and a beautiful arrangement of flowers
2. Draw a picture of the inside of your stomach and the food in it after a big meal
3. Draw your idea of
4. If animals could draw, what would their artwork look like? Draw their artwork.
5. Why are people afraid to visit cemeteries at night? Draw it.