For the Melbourne races, there is some leeway. You can do some paint scratching without getting a fail. So it's not NO CONTACT.
Goal 1, just pull back from the crowd in the first two turns and you'll have plenty of time to overtake and get fastest lap in 3 laps.
Goal 2, yeah, the bots will finish this in less than 1:10. So blocking out is required at the beginning to delay them.
Goal 3, you have 7 laps to overtake 8. So just take your time and you can do this clean and easily overtake the entire field once done.
Nothing special in goals 4 and 5.