Welcome David1953! First of all, sincere condolences for the loss of your brother - that must be a heavy burden to carry on top of having to deal with a diagnosis of diabetes....my thoughts and prayers are with you.
I also am a cancer survivor and had loads of chemotherapy with two of the cancers.....really messes up one's body and how it functions for sure. One of the most important things you can do for yourself is to take a deep breath, accept that diabetes is now an everyday "partner" in your life, but doesn't have to control your life in a negative way, which it probably feels like it right now. Given time it will feel differently.....many on here will tell you that diabetes is a marathon, not a sprint.....it takes time, energy, a purposeful pursuit to figure out what works best for you......read, read, read and filter through what sounds doable for you.
There are many knowledgeable people on this Forum - it has been a God send for me and many others - so do not hesitate to ask questions, rant, rave and scream - even though we won't hear you
- and you will feel better.
There are also many here, like myself, who will be praying for you, for strength, patience, comfort and acceptance. Feel free to PM me as well once you figure out how to do so. I am a woman, but been on the faith journey for more that 50 years and He has never let me down or failed me yet! Blessings/L