I can't help with directions in SJ, but can provide years of wisdom gleaned from the forums in one little blurb....
Rules for new commuters:
~Just do it... then just keep doing it
~Ride It Like You Stole It
~Keep The Rubber Side Down [This one is of critical importance!]
~When you start talkikng youself out of riding....just Shut Up and Ride
~Buy new goodies/bikes with the money you save
~Constantly show off sexy biker legs to wife/gf/bf/whatever
~It never gets easier, you just go faster[well at first it gets easier]
~Work..it's the ugly time between rides
~Objects in your mirror are stupider than they appear
~The unintelligible comments from passing cars are always compliments
~Sweat and snot[in winter] are sexier than you might think
~If 2 bikes are headed in the same direction they are racing
~Your new name is Fred [or Wilma]
~The response to "Get on the sidewalk!" is "Ride your freakin' bike!"
~Once you are completely soaked, you can't get any wetter.
~Don't worry Be Happy
~Perfect your shower time down to 4.25 minutes. You'll be doing it a lot.
~Yes, helmets are dorky, but you should still wear one.
~Laughing at JAMs makes them madder than giving them the finger.
~Don't ride through Garbage Juice..especially when cornering.
~Quickie Marts are the cycling oasis [Gatorade fits the bottle holder].
~When you are bonking, chug down a coke...aka "Rocket Fuel"
~When someone bails you out, you are obligated to pay it forward 2x
~Biker Tan... Set a new higher standard for Farmer Tan
~Bicycles, the other fun thing between your legs.
Congratulations on your first ride !