The amiga is now a retro machine and nothing else. Yes i know people dont like the newer OS's and i think about 80% of people are in the same boat, but you just got to put up with it i guess and make the most out of what you got.
The Amiga was a very good thing when it was out with all the software being made for it and it paved the way for other systems, but developing for it now is a lost cause.
You might as well learn something on the PC and develop for that or if your really going to make anything on the Amiga go for it but dont expect it to rise the Amiga from the dead.
Only this week i was thinking about learning all over again to make games on the ZX Spectrum 128 and the C64 as i used too, but i know even if i do write games for it they wont be main stream.
Oh and by the way as i was a big amiga fan i bought a 600 and a 1200 with cards for extra memory,FPU and so on just to play games which i have to say is far better than running WinUAE.