Model disappeared in open viewport

When I open my viewport in layout my model in top view is nowhere to be seen. I’ve literally just installed today to see if I should replace autocad and sketchup but the complexities of simply finding my model extents seems to be impossible?

All I can find via window and extents is a tiny yellow highlighted dot which disappears when I zoom.

Probably means you have one or more elements way, way far away from the the others.

Thanks. It was right in front of me. Zoom all. Not extents.