God wants us to be thinking about whatever is lovely (Phil 4:8) but the trouble is, that just like everything else, our sense of beauty has been corrupted by the fall. We can’t always trust ourselves to know what is beautiful. So we have to go to school. Of course we learn a great deal about beauty from the Bible but God has also revealed himself in nature. That makes the changing of the seasons a great time to learn what is beautiful.
And then use what you notice to make your home beautiful. I haven’t always known where to start with this, but here’s a simple one: cut some fresh flowers and bring them inside! Lovely!