My 16yo daughter was diagnosed when 12yo, almost 13 (considered a "late" T1 diagnosis). I turned to books, online forums, and an "in-person" support group locally. However, the last ends up focusing 95% about how to deal with the school systems, so a lot of it is not relevant to me, although it makes me VERY thankful we homeschool. I am unaware of ANY other T1 homeschoolers in our area, so it can get a little lonely, but I do think that home schooled T1s have it way easier.
We also made carb charts for common homemade meals that we eat, to make carb counting a little less overwhelming in the early days. That helped a lot. Food scales are helpful, and the Calorie King little book helps too. Now they also make carb-counting iPhone apps, and those can come in handy also.
It is very overwhelming at first, but you do adjust to the new normal. Our biggest long-term challenge is well-meaning older people, familiar with T2, who keep trying to push diet food on our T1. Sigh.
We were quite reluctant to move to a pump, but now we are glad we did. After you get over learning how to use it and how to change the infusion sets, it does simplify life. But your doc will probably want you guys to stay with injections for at least six months first.