Azaleas are outdoor trees, and need to stay outdoors. They can be brought in for a day every now and then. I bring mine in for an evening sometimes, but back outdoors. There is no way, well without spending a small fortune to duplicate their needs. There are some indoor trees that can stay inside all the time. Look for some tropicals. Even them i put outdoors in the spring, summer, and fall. If you want the tree to get larger, then it needs to be put into a larger container, or better in the ground. But if your happy with the size of the trunk, then put some wire on it to get some shape into it, and then start deciding which branches/ you want to keep, and chasing the foliage back in towards the trunk. You will have to get something in mind before you can go too far. Yes, i think it has some nice movement and shape. Does it have any surface roots under there?