You will not be running in week two, and that is not a setback.
ACL rehab is measured in months because the graft has to heal into the bone before it can take real load. That part is not negotiable. What is negotiable is how strong you are by the time it gets there.
The first six weeks are about two things: getting the knee completely straight, and getting the quad to switch back on. Almost everyone loses quad control after this surgery, and how quickly you get it back is the best early sign of how the rest will go.
Months two to four, we load it. Months four to nine, we teach the knee to accept force again — landing, cutting, stopping.
Before you go back to sport you get tested: hop tests, side-to-side strength, movement quality when you are tired. Athletes who go back without passing those tests re-injure at a much higher rate. We would rather you go back late and go back once.