If your work does not bring you joy and fun, then something is wrong. Good mood in a team is of great importance. Pay attention to everything that can improve the mood and the atmosphere in the team - work place and environment in the office, lighting, amenities teambuilding and everything that could improve the atmosphere in the team.
Counterpoint: Do not overdo it! You have gathered to do work after all and that should be the focus of all activity.
Go over the points above and quickly draw the line about how things are in the team you work with and how can you contribute to improve things where you think they could be improved.
Share in the comments what you do in your team! We will be happy to read it!