I'm really new to GIS tools.
I'm trying to make ortho projection maps of all the countries. I've downloaded Natural Earth Data and QGIS. I imported the data files by dragging them into QGIS. I added a Grid to my default projection by using the "Vector->Research Tools->Create Grid..." menu option. Then I densified the grid with "Vector->Geometry Tools->Dentify By Count". Then I switched the Projection to a custom projection defined as the Proj String:
"+proj=ortho +lat_0=23.868 +lon_0=121.0521 +x_0=0 +y_0=0 +a=6371000 +b=6371000 +units=m +no_defs"
I've tried poking around the menus and searching the internet for what I did wrong, but I haven't had any luck yet.