Hi Rhonda,
I had an abscess rupture which led to an emergency surgery that got me my temporary colostomy, which will be reversed in the next couple weeks, and I am mildly freaking out about 
I did have to go to physical therapy for back pain, but I’ve had back surgery in the past for a herniated disc, but physical therapy works absolute wonders for back pain if you stick to it and don’t stop improving.
I also had liquid a lot at first (or not solid stool) and still actually do 8 months later, I’m not sure what exactly causes it in my case, but this can lead to essential nutrients not being digested from food and you’ll want to hydrate with vitamin rich sports drinks for potassium / electrolytes to avoid getting dizzy. This is very important.
You will find the bowel movements will be so weird, mine changes between solid chunks / tons of tiny bean sized solid chunks / glue like consistency / liquid, I’d be very clear on how to use barrier rings (the glue like rings you put around the stoma before the bag) to ensure you don’t have bag leaks.
Be very familiar with how your bag sits when properly resting on your skin, as this will help you find if you have a bag leak that is (grossly) apparent and have fecal matter laying on your skin, as this will cause weeping skin which makes the bag not stick and this is just a nightmare of a cycle to deal with!
I however have not had any food restrictions since my colostomy, it took quite a long time to get comfortable with emptying and change it.
ONE VERY IMPORTANT THING - Do not change your bag more than every 2-3 days at earliest! Noone had told me this until I got a superficial skin tear caused by changing my bag too regularly from going to the gym, as I’d sweat so much and then shower I figured I’d just change it every other day.
It was a nightmare for me to go through my tear as it was the hottest summer ever recorded this last year with 90% humidity, so I also got some sort of rash or infection while I had this tear, and was in the ER weekly for awhile because the tear wasn’t healing / getting bigger / I was getting fever and it could have possibly been a serious infection or sepsis… Just an absolute nightmare.
Though you will have it over winter, you are very fortunate in the way you will be able to wear coats / sweaters until you can get it reversed so going out in public should be too bad, and it should be dry air to keep the risk of skin rashes or infections pretty low.
Be sure to keep it on no longer than maybe 4-5 days, as you will want to clean off your stoma to keep it healthy, and make sure everything looks good. I tend to push stool down in my bag once it pops out so its not just sitting on the stoma, but found it can cause bleeding on the stoma itself which really freaked me out when I first saw it. It was verified that it was probably due to me pushing stool off my stoma causing to rub against the sides of the bags opening and just kind of being rough on it.
These are all things noone had told me before they booted me out of the hospital, feel free to ask any other questions and I’ll answer what I can, the time will go by in no time til your reversal and hopefully you aren’t freaking out about that like I currently am 