that page does cover about everything on the official/legality front but theres so many more cultural things. Too many to really go into detail but one simple rule is never forget politeness, even if someone you're talking to is purposely forgetting it because you're a foreigner (something that WILL happen).
And hopefully you're not too nervous about being stared at, it'll happen every few seconds if you're walking down the street and constantly on the trains.
(that reminds me, I need to post about my little social experiment I did back in November
)