When you get in the CaraQ Room, you will see a Decoate icon when you click yourself. Or, you can find the Decorate icon at the bottom of the tool bar.

When you click the Decorate icon, the system will jump out a hint window as below.

When you click OK, it will switch to a decoration mode for you to decorate your room.
Following the icon list below to decorate your room.
After you have done your docoration, remmber to click "done" button at your top right corner to exist the decoration mode.

Right click your furniture to relocate your furniture if you want to put it in another place. You can also rotate your furniture angle and re-store your furniture as want.