I attempted on my first aquascape to glue the whole scape and try to lower it in by myself and it was HELL. I ended up putting it in a type of makeshift sling and breaking it in a few places. So second time around I glued sections and fit them together. Still fell apart over time.Absolutely had help!
Plus these pieces aren’t all glued together
I assembled them on my kitchen counter (that didn’t go over to well) and glued the primary pieces only.