I agree - a stoma nurse will be invaluable for you at this stage.
I will say that looking after an ostomy is very easy - I was doing it all by myself at 10 years of age so it obviously can't be that hard at all :)
I usually change my bag once a week but normal weartime can be anything from 1 day onwards. It's the ostomate's eternal quest to find a bag that lasts so experimenting with different brands after you've healed a bit will be the best way to find out what bag and wafer will work best for you - there are many out there to choose from and you do not have to stay with what you were given in the hospital.
I usually empty my bag approx 4 - 6 times a day depending on what I have or haven't eaten. It's quick to do - two minutes and I'm out of there (unfortunately, you will find your reading time in the loo reduces to nil - my one big regret *sigh*)
Have a look at http://www.ostomates.org for my story plus plenty of others. There are pics of stomas and bags and anything else you could wish for regarding ostomy surgery.
I'm not a complete idiot - some parts are missing!
Ileostomy for 27 years since I was 10 years old, due to UC.