Well if you have no experience whatsoever how are you thingking about porting a Pc game to the Amiga.
Besides that the Amiga hardware is to weak to really port games to. The videocards are to slow to really enjoy a pc game that would have been ported.
Speaking for myself i am making an Amiga version of the gameboy advance version of Advance Wars 2 black hole rising. It's no port just reverse engineering Arm code and write from the ground up 680x0 code. At first it will run on a classic Amiga 500/2000 with a bit of a ram expansion.
Later i am thinking to do a A1200 version.
If you are eager to program and write games perhaps that could be an idea for ya. There is enough coding material around for the Gameboy and Amiga to get you started.
My development system is a PC where i use a GBA emulator and WinUAE to write the code on. Later i test it on a classic Amiga to check compatibility. This process of creating a game give much fun. Of course i code in Assembler C++ sux and takes longer to learn.
PC to Amiga is mostly not do-able because the Amiga is far to weak but Gameboy games give's you enough challenges, but dont expect to make an Half-life 2 or Battlefield 2. And a PPC Amiga well its not the real thing ya know!!!!
