Golu usually takes place during Navaratri and concludes around Vijayadashami. Diwali follows later in the festive calendar. Because the celebrations are relatively close, they can feel like part of one long festive season, but their rituals, stories and dates are distinct.
For first-time hosts, a simple display can be enough. Start with a stable set of steps, a small group of meaningful dolls, a lamp or puja space if that is part of your family practice, and room for visitors. The collection can grow over time.