That totally depends on the nature of the scar, and it is also individually different; in some people their acne scars remain visible for ever, while in others they fade away (I belong to the latter, luckily).
But, yes, not interfering with the healing process will help to heal your skin, which means: no speading up of the healing process, not touching it too much, as little sunlight exposure and not retaining too much water (Wai diet).