Hi Crewegirl, welcome to the forum. If and when you have to go onto insulin, there will be no need for you to stay in hospital, unless unless you have developed complications due to excessively high blood glucose, such as a high ketone count and need to be stabilized.
Your best bet is to have the conversion done at your local hospital diabetic center, not with your GP. The center is better equipped and will have a better trained diabetic team, who will give you the necessary education and training that you will require. Ask you GP for a referral to see a consultant Diabetologist.