I've been biking to work every day for over 6 months now, though mine is considerably shorter - 2 miles in SF.
I got tired of being stuck on cramped muni trains not going anywhere and figured I could use a little exercise every day.
Anecdotally, the motorists are more aware of bikes now than they used to be (just because there are more of them), but you still need to ride pretty defensively.
a) Make sure you're visible. I always have lights and reflectors, and wear hi-vis jacket if it's dark out
b) Always assume there's an Uber about to do something dumb and dangerous - ride defensively, don't assume that drivers see you, seek eye contact, don't be afraid to take the lane
c) Relax, take it easy, it's a wonderful city to ride in.