The key to use chopsticks is that the bottom chopstick remains still while only the upper chopstick moves. The thumb holds the bottom chopstick firmly while the index and middle finger pivots upper one to meet the bottom chipstick to grasp the food.
The food we ate with chopsticks:
・apple
・gummy bear
・cracker
・potato chips
・carrot
・pickles
・almonds, etc
Chopsticks are not only for Asian / rice oriented food.
"Eating with chopsticks everything tastes better!"