I’m so glad to hear you ended up with a doctor and nurse that you really like! That can help the whole process so much.
I had a friend with an colostomy bag. In her case it was permanent and a huge improvement to the Crohn’s she had been living with for 25 years or so. After surgery, it took her a few tries to find the right equipment combo for her, so hopefully they will send you home with some sort of sampler pack