What is the appropriate outfit for a House Church?

The top is fine, the skirt is too short and the shoes are certainly inappropriate. You can go to walmart and get some good dress shoes for about $12. You need to find a skirt that it below the knee line. I was always taught that when you go to church, no one wants to see your knees or feet, meaning that the skirt should be below the knee and you should wear close toed shoes.