Welcome to this site. I wish I had found it earlier. You are one of the lucky ones if you can keep your bladder. I guess it really is UNlucky if you need any kind of invasion of your body.
I just talked to a man who searched around for a doctor who would let him keep his bladder for a year. He went to 5 doctors, who all said, " We need to remove it". He finally found a Doctor who did the BCG and didn't recommend removal. Now, He is a year out and has just found out that it is Muscle invasive and Aggressive and he needs Chemo and surgery.
Please keep your doctor on top of this and be sure he is ahead of the game. I was diagnosed in June and had to robatic surgeries in July and bladder removal in August. At first my doctor said I would NOT lose my bladder, but he kept on top of it and quickly di what he had to do.
If they don't ever have to do anything other than robotic, then GREAT! But make sure they keep on top and aren't afraid to go to the next level.
Good Luck ( St Patricks day is one day away and may the luck pour on you) and keep us posted. You will always find great people here to lean on, even though they are purely cyber, they are great.