I have been a type1 diabetic for 13 years. I am 18 years old and I have taken an interest in underwater welding. An I'm not sure if its relevant, but I am a female.

I'm going to take a stab at this and say no... for this reason, you are likely to be underwater for long periods, and you are going to have big swings in your blood sugar in those situations... and having an episode resulting from low blood sugar while on a dive could prove to be fatal.