| It sounds good to me that you want to become more active. I think the toughest part of things for many people is finding an activity or activities that'll keep them active. My bit of secret wisdom to that is finding something you will love or enjoy doing.
I also think it's important to try to add it in somewhat gradually. Dont go overboard with anything, try to see it as something you will want to be doing a year from now, 5 years, 10 years, 20 years, etc. That idea is perhaps especially more important for us type 1 diabetics, get used to the fact that you are going to need to at least test before exercising and test immediately after, maybe even testing at times during the exercise period, because you'll need to figure out how to handle your individual profile so you can exercise safely and in a good blood sugar range.
I like running, but if you do decide to do running, you need to be cautious. Running is one of the more stress bearing cardio activities -- if you pile on too much too quickly, you can risk injuring yourself. Injury is bad, if you're injured it's going to put a crimp in your ability to be active and exercise.
If you do try running, I'd suggest first spending a couple of weeks doing 3 walks, 2 during the week and 1 on the weekend. Maybe Tuesday, Thursday and Saturday. Walk at a good brisk pace for 30 minutes on Tuesday and Thursday, then for 40 minutes on Saturday. See how that goes and monitor your blood sugars as if you do those at a brisk pace you'll begin to get some idea of what to expect maybe when you start running.
It's also a good idea if you're going to start running to visit an actual running store -- have a person fit you with a pair of shoes that'll be the proper kind of shoes for your gait. It's not a good idea to run in just any pair of sneakers you can find or even from a big sporting goods chain. Have someone from a running store see how you run and fit you with a proper pair.
With the walking and shoes taken care of, then begin mixing in some running with a goal of eventually converting those times that were spent walking over to running.
I'll let you in another secret. Running isn't all about speed. We tend to think of it that way, but for people who do run, a lot of the running is done at an easy conversational pace, that is you run slow enough that you could easily talk with another person. This slow running is critical to building up the legs to handle faster running.
But whatever may be, you may find you don't like running, so remember there are other forms of exercise, cycling, rowing, weight training.
For that matter, even some simple strength training can be added in to your weekly activity by doing push ups and if you've got something to hang from, pull ups and chin ups. Simply doing push ups and pull ups regularly are a great way to build upper body strength. | 
