The Amiga was more 2nd gen. I think the Micro equivalent was more like an Apple I/II. TRS-80/Tandy Color, or Vic-20/C64. The Amiga was Motorola 68000 based and at a clockspeed that really outran those zlog and 6502 based early devices.

The Amiga was a pretty impressive device with an OS that was fairly advanced. You could probably use it still today for word processing and sound design and not feel like you're missing much. The OS looks a lot like one of those super low-resource linux DE's.