Yep I'd steer well clear of learning Flash at this stage of the game (pun intended).
If you want to make some money writing games these days then you'd have to be looking at Android/iOS and mobile platforms.
Even C/C++ is almost worthless in the commercial scene these days, the 'big boys' are more game designers using software tools than actually coders developing software routines. They mostly just use an off-the-shelf product with an API that plugs into the 'game creation' studio.
All a million miles away from Classic Amiga game development.