I have suffered from many looooong episodes of depression. Even well before my diagnosis of T1. First, a good therapist can help, even though unless they are T1 they will NEVER truly understand. Second, there are new treatments for depression. I used Ketamine infusion for the worst of it (it can help you in your ability to get out, take care of yourself and FUNCTION). Third, my CGM has allowed me to see where I am at all times (few sneaky lows, understanding the crappy feeling of highs and whether I want to correct).
In short, you can handle it. Just do your research. I’d be happy to talk about Ketamine. It got me through a really rough year.