Do you have a hallway that he could chase a ball up and down the hallway. Perhaps, this is a good time to train your dog. I have trained my dogs to sit and stay and then I walk out the room and they are trained to stay and they do. I trained my dogs to do this both indoors and outdoors.
Training your dog to sit, heel, stay, walk beside you, come, etc. you can do while indoors. It doesn't require a lot of room. When I first trained my dogs to sit and stay, I did so inside my house because there wasn't anything to distract my dogs.
I was in 4H and that is where I learned how to train dogs.
There are lots of websites and videos online for training dogs.
