Sorry to hear that.
I had a detached retina 2 1/2 years ago (I think that's the time). I had emergency surgery after presenting at the local hospital following an opticians visit earlier in the week that had failed to identify the problem. I was promptly sent from Harrogate to York, being told to 'Get there as quickly as you safely can, the surgeon is waiting.'
I had a vitrectomy (removal of the vitreous) and cryotherapy. This is concluded with injecting gas ( a mixture of air and sulphur hexfluride). It took about 6 weeks for the gas to be fully absorbed and removed. During that time flying was forbidden and the one time we drove over the hill to Skipton the pressure change going up the hill caused significant pain and concern. Thats was 3 or 4 weeks in.
Also, if you have cryotherapy, you want to avoid raising your blood pressure too high or shaking everything up until you have a fair degree of healing around the tear. I eventually just took 6 weeks off and started again gingerly to be confident everyhting was properly stitched together.
Also, be aware that one of the (inevitable) complications of a vitrectomy is a subsequent cataract. I have probably docmented elsewhere my frustratoin at the lack of knowledge of this amongst opticians, even as they are happy to prescribe glasses that are out of date befor they've made them up - the cataract typically leads to increasingly short sight. By the time I was wearing self prescribed -12 contact lens in that eye just to see, I had to more or less force the optician (one of several I tried) to refer me to the consultant. His fist response was that his machine could barely see through the cataract!!
I subsequently had lens replacement surgery and my right eye now has 6/5 vision, a good field and less than 0.25 dioptres of long sight that I don't need to correct. In all, it's better than it's been since I was about 5, but it was a long and difficult road.
I also use an optician who was suggested by my consultant who does a lot of NHS clinical work and is a completely different kettle of fish to the previous. I have no qualms in setting this out, because at one point I was digging up and taking scientific papers analysing the progress of of cataracts an dassociated increasing myopia post-vitrectomy to the opticians and they were still trying to prescribe again rather than refer.
Hope the op goes well. It's a scary thing to face on your own, but some of us have been through it before and will be happy to answer questions if we can.
Mike