You can use the search bar on top to start a new conversation or find one of your contacts. Once you are in your chat box, you can click the ⋮ on the top right of the screen near the search box to change your settings with the person that you’re texting.

Click on the contacts you want in your group and then click the -> sign. Add a group icon, name, and description per your liking.

You can add a Community Name, group icon and select groups of your preference.