You can't run Dolphin in Linux with your hardware. There is no way around that.
Windows is your best bet at getting dolphin to actually boot a game. But your hardware is too old and slow to run Dolphin at full speed. So the audio will suck and everything will be slow.
Windows is your best bet at getting dolphin to actually boot a game. But your hardware is too old and slow to run Dolphin at full speed. So the audio will suck and everything will be slow.