It is a problem with Corona, especially at this time. One start point may be to use v1 compatibility mode which you can turn on by adding a line to config.lua
http://docs.coronalabs.com/guide/graphics/migration_v1.html
This is used so Graphics 1.0 apps can be built under 2.0 (I guess), and it should fix most of  your problems. What you want to avoid is the old sprite library which isn’t available at all.
I think this is noticeable by sprites being done by sprite.newSprite() rather than display.newSprite() - sprite.* was before my time 
It doesn’t matter too much that you learn 1.0 rather than 2.0 - the main differences are the ‘anchor’ point of display objects, the colours now use 0-1 rather than 0-255 and setFillColor replaces setTextColor.
Graphics 2.0 offers new stuff of course, but that’s extra stuff to learn once you have the basics.