Start by observing lots of caricatures and understanding the basic techniques. Practice regularly and don't be afraid to make mistakes. Also, learn from the works of experienced caricaturists.
Some cartoons show sad people to explore deeper emotions and teach us about dealing with tough times. It can also add more depth to the story and characters.
You can start by sketching the basic outline of the rams, paying attention to their shape and features. Then add details like the fur texture and expressions.