Teams allows you to start chatting without the need for webcam or audio as you can chat via text through the Microsoft teams chat function
1.Navigate to the left hand side of the app and find the speech bubble icon. Right click on this and select "new chat".
2. Once a new chat has been created, you will now be able to add anyone you like including whole groups or individuals. Anyone from outside your organisation will need to be added through their full email address where as anyone inside your organisation will be in your contacts.