exuberant - enthused
The term ‘exuberant’ is characterized by being full of energy, excitement, or happiness. It is not merely a temporary state as a result of something good happening; some people can have the attribute of exuberance, a quality particularly associated with youthfulness.
Claire impressed in her job interview. They liked that she was exuberant and highly driven.
John didn’t mean to step on anybody’s toes with his impulsive action. It was just youthful exuberance.
Soon after the news broke, people were out on the streets celebrating exuberantly.