I wish you a fast and total recovery with full eyesight in that eye!
Joe, the first week will be the worse, unless of course if you have to position face down.....then the remaining weeks could be mental torture because of having to keep your head down 23 out of 24 hours a day.
However they tell you to position it's very important to do it to keep the bubble pressing on the spot where the tear was so it would heal up.
I also had a dr with a terrible bedside manner and she never took the time to explain anything, and of course it's scary to go through.....TG her surgery skills were excellent and she saved my sight!
I had a totally detached retina (off macular) about 6 years ago. I didn't have oil put in my eye instead I got the silicone buckle that's still around my eyeball, but I did go home with the gas bubble which I think lasts about 3 weeks.
For me, once the pain was gone after the first week the whole healing procedure was one of optical illusions and quite funny. I did have to "position" and sleep upright, and I considered myself very lucky because a friend had to keep his head face down!
First of all when the gas bubble starts to break up toward the end you could have a dozen little bubbles, every day they are different, and one day you wake up and it's all gone!
Maybe it was because of the macular being damaged or maybe just from the surgery, but when I looked at a picture the heads were funny shaped with small pointy chins and big wide foreheads (alien looking), and if it was a full body picture the heads were little tiny pin head sized on a normal sized body.....no I wasn't on drugs then! lol
For the longest time everything looked smaller in that eye too.
Straight lines like walls and picture frames are wavy and that too gradually disappears without you noticing the gradual change.
One thing I noticed was when I first woke up my sight was very dark and was told it was the "cones and rods" in the retina needed time to warm up - like an old picture tube.
Within the year I developed a cataract in that eye and once that was done I could see pretty well. The dr did a ooops and gave me a lens for close vision so I no longer had the need for reading glasses

Back in March I had a bunch of floaters let go in my other eye about 6 months after having that cataract removed, so I had a vitrectomy and laser done to fix the tear on that retina, and so far it's been holding. I had a different dr do it and he was the most reassuring, patient doctor ever! He takes the time to answer every question.
Again - best wishes for a quick and complete recovery and if you have any more questions ask away.