Dear Oz, I am so sorry about your brother. I lost my younger brother about a month before you lost yours (Feb 10). He was 40 years old. I still cycle through shock, anger and sadness on an almost hourly basis. My brother was a bit like yours - he liked to motorcycle and be outdoors (loved climbing), and was kind and generous, the heart of our little family - he was my only sibling.
I have to work too, and I wonder if the hardest part about it, now that it's about 2 months out, is trying to act normal and professional to colleagues and acquaintances on top of the already exhausting sadness. It's so draining.