The regime can vary greatly depending on what the surgeon finds when he's in there, his particular experiance and there are more or less "conservative" surgeons. Here in Switzerland the "mobilising " afterwards is partial but the arm can be in a Gilchrist closed in sling or a light sling afterwards or a splint /cushion in some abduction or or. It's therefore not always possible to say what you will have exactly. One thing here is sure that there is to be no active abduction during the first 6 weeks because of the danger of pulling out the anchor!! Your arm will not be the person to tell you what you can do straight away post op. You might have more or less pain and you will need medication to control it.
"Physio" from day one does not indicate GO FOR IT MOVE but a sensible, based on healing times for the tissue assisted or passive only assistance to maintaining movement. Neither does physio from day one mean so much range of movement as possible so early as possible. Here, the allowed movement in the allowed direction is specified by the surgeon. Here, from 7 weeks on the movement is more active. Car driving not advised before 6 weeks; back to work for office type jobs 3-6 weeks. Hard physical jobs often 6 months. Rehab goes, depending on type of injury, repair and patient from 3-6 months. You will be at the 3 end if you are fit and young and do the rehab accordingly. That means you may start sport specific training then (at 3 months), not that you are already finished with it! You are a while since the initial injury and have probably adopted patterns of shoulder movement that are not optimal and it's extremely important to optimise your shoulder blade position/stabilisation then a so called centering of your glenohumeral joint. Failing to do this correctly will result in possible problems later like an impingement of the humerus head on the structures above it. Ask your chosen surgeon about his rehab regimes as to what comes when. We are lucky here to have reasonable post op regimes online at the local hospital and enough downloads of patient information to be informed about the main issues before the op. You will probably not be so lucky but try and ask anyway. And ask "why's". "conservative" must not always be taken as negative. Or if your surgeon isn't decided on 100% yet ask around. Don't only compare other peoples shoulder experiences because injuries, repair jobs, healing times and the individual types of people make for different results. And apropo re-rupture: the tendon hangs on the threads post op joining it to muscle and before 12 weeks is not fully repaired/healed. Take one step at a time and I hope it goes well for you.