Easy mistake: easy fix. 😕
Select All
Scale
Start to scale up in Z [blue] direction.
Type -1 +<enter>
It should now get fixed to be correctly oriented ?
Change your view to see it so that Z [solid=blue] is 'up' !
☀

And show everyone what YOU are doing. A week or two and you'll get an idea, I hope, of how your own progress will go.