Our daughter was diagnosed under similar circumstances at two years old. Spent one month on the ward and didn't leave until we had both the Pump and Dexcom G5, mainly to ensure they didn't try and fob us off without providing them.
It is a massive shock, and slowly you come to terms with it and all the changes it brings.
She is now five, still has the Dexcom, but a G6 now. Our pump has temporarily changed as we are on a clinical trial for closed loop at Addenbrooke's, which has vastly improved the quality of life for all of us.
As each journey is different I don't know what will work best for you, but I am happy to try and cover any queries that you might have.
Wishing you all the best.
Andi