Laughter is incredibly underrated. This coming from someone who is somewhat reserved.
When I was younger, I had a friend who always openly laughed at anything he found to be funny. It never mattered. That laughter always put people at ease around him. People naturally gravitated toward him as a friend and someone they wanted to know.
It’s more the opposite for many people. They are unsure if laughing is OK and hold back for fear of being seen. Laughter is confidence in my opinion and holding back laughter is not a good idea. It’s also a very healthy thing to do every day. Don’t be afraid to laugh, regardless of the situation.