I think I understand, so I'll throw out an answer

I apologize if it is not what you asked.
Do whatever you find most fun. There are many aspects of the game, and you can take your time before you get around to decorating. You don't have to follow a special order.
I spent a year playing without doing much to decorate my town at all. I was very interested in collecting all the items for my catalog and befriending my villagers. It was a great year, and I had plenty of fun. I did spend time breeding hybrid flowers, because I considered that part of having all the items in the game. But I did not create a dream address, because there was nothing to see in my town.
After a year had passed, I started decorating my town. This included moving trees, putting down paths, constructing public works adding bushes and flowers. I also have just started using all those items I was collecting to decorate houses a bit more rather than just putting a set of furniture in each room.
Have fun!