I’ve been going to SW for a while and there’s at least one other T1 member in my group. As you have the referral then why not go along and see, nothing to loose!
You’ll be given their special leaflet on Diabetes, which is mainly aimed at T2 but still. SW encourages home cooking as much as possible, (even the ready meals and pre-made sauces come with the recipes) so it’s very easy to just cook more protein and less carbs. They even have a low carb plan, called SP, so you can look for SP recipes on the website etc and choose lower carb fruits and veg as they are marked “S” in the book.
It does vary depending on the consultant so if you don’t get on with the first one you meet do try another group. The motivation of the weekly weigh in, and the supportive community, are well worth it. Stay to group though, or you don’t get that benefit.
Good luck!