Practice "sketching light." Draw dozens of circles and squares without pressing hard. The Power of Exaggeration Realism is the enemy of cartooning.
Should I include a for a specific character? paper and pencil ? I can tailor the advice to fit your specific audience .
Draw a curved line first to represent the character's spine and build the body around it to show movement. Find Your Tools You don't need a tablet to be a cartoonist.