R 1250 RS (2020) Engine oil, oil filter, air filter, rear drive oil, and brake fluid recommendations

Just want to gauge what people who do their own maintenance use or recommend. My local BMW dealer wants CAD$525 for these jobs + the parts for a total of CAD$818.

This seems totally outrageous me and would like to see how much time one would need if doing all these jobs for the first time. I am pretty mechanically adept.