I'm attaching the report from my project, I'm trying to create an ortho but I still haven't been able to merge the tiles after running it twice. Thanks for the help!
Crystal
1) for tutorials, yes. See here for drone imagery: Create Drone Imagery Products in ArcGIS Pro—Imagery Workflows | Documentation and here for scanned historical imagery: Create Scanned Aerial Imagery Products in ArcGIS Pro—Imagery Workflows | Documentation
2) regarding ArcMap vs. Pro, in general yes you can use ArcMap, since the geoprocessing (GP) tools used for Ortho Mapping in ArcGIS Pro are also available in ArcMap. However, I strongly recommend you use Pro for several reasons.
Without these graphical user interfaces in ArcMap, you can still enter coordinates for the fiducials and also for GCPs but that may require you to use other methods to identify the necessary coordinates.
Cody B.