Video of Tracy Morgan walking around -- 6 months after the accident that nearly killed him -- is pretty damn inspiring ... considering what the comedian's gone through.

Tracy made a rare public appearance outside a NJ post office on Wednesday ... moving slowly and gingerly with the help of a walker. His fiancée, Megan Wollover was nearby for support.

As for how his recovery is going ... a determined Tracy told the camera guy, "I'm fighting everyday."