Put instructions on the object
Use numbered hotspots for parts that need explanation. Keep the copy short, identify the relevant component, and make the selected hotspot easy to find again.
Use a tour for sequence
Tours are useful when order matters: introduce the product, move to the main interaction, and finish with care or service information. The viewer should always offer a way back to free exploration.
Test the published path
Preview mode can hide access and sharing details that matter to a customer. Open the published link on desktop and mobile, check the focus order, and confirm that every hotspot and step survives a reload.