How do I upholster this couch?

Here is a photo of it. I wasn’t able to save the cushions or the old upholstery to use as a pattern because it was in terrible condition. Can anyone explain the step by step process of how to go about this or point me to a good website? And what should I look for in a fabric? Obviously I need something that is strong, easy to clean, and durable, but maybe you can recommend fabric weights or something? I know how to use a staple gun and what the end product should look like, but that’s about it.