Controlling settings, permissions, and membership within Teams and channels
Here is an articleon how to set up a team. If you have the right permissions, this should be a straight forward process.
Create a team
On the left side of Teams, click Teams, at the bottom of the teams list, click Join or create a team, and then click Create a new team.
Once you've created the team, invite people to join it. You can add individual users, groups, and even entire contact groups (formerly known as "distribution lists").