Your comprehensive claim will show up on your reports for auto insurance even if it was done for a motorcycle. The good news is if this is your first comp claim, it's considered not-at-fault, and most companies will not adjust your rates.
From what I understand, using Amazon's in-car delivery should not affect your insurance rates. Because the couriers don't drive your vehicle(s) and are simply dropping items off in a parked car, I don't see any concerning factors an insurance company would worry about — unless a courier vandalizes or steals your car, which seems unlikely. If you have any other questions, don't hesitate to ask.
I'm sorry but you will not be able to have an accident forgiven and removed from your record. Depending on the insurance company, they have specific rules about accident forgiveness — generally, you need to be accident-free for a few years before an accident is forgiven.