How to stack photos using Nikon d3500 to capture moving star trails?

I have basic Nikon d3500 camera with Nikon Capture nx-d software installed on my machine. I am able to capture shiny star at night with long shutter speed, wide aperture and ISO.

I have to capture moving star trails, circular star trails. Nikon d3500 is missing remote shutter. could you please let me know how to stack photos and mainly how to use interval technique in Nikon d3500 to capture multiple photos.