Sweet home 3D is an excellent and simple software to design interior. Follow the step-by-step videos which I made, you can create your room and have a nice render.
https://youtu.be/uGZSo9n-mYA?list=PLj7WtcHa4GE-UdWQ2V9gk3U9Iz7y7RDgc
Hope you like it.