My son and I built a birdhouse. Can we get birds to use it?

We built a simple birdhouse over the weekend and hung it high on a tree trunk. Are birds supposed to move in? As in, use it as a home, make a nest in there? Or is it more like a rest stop where they might go in a storm? Should we put bird seed inside it? How will they know it’s in there? Should we put twigs in it and straw so they have materials to build a nest?