Just got my first road bike yesterday and I am having a blast. Any suggestions for a begginer
Watch out for cars, don't wear anything that can't get sweaty, road-grimed or covered in mud, don't do anything stupid, wear a helmet and learn the "On your left!" and "On your right!" rule.
It's funny that biking keeps popping up in my life though: I'm an avid cyclist myself and I was at my local velodrome about a week ago and saw a pretty terrible wreck.
A few days after that, I went to my teacher's house for my lesson and when I walked in, he wasn't in his front room where he usually is and nobody seemed to be running about (his wife's a violin teacher as well, so there's almost always people running around his house).
I found this odd, until his wife noticed somebody was there and came downstairs to meet us. "I think he's downstairs," she said, and on her way to the basement she turned to my mom and myself and said: "He broke his collar-bone."

Apparently he'd been out riding around his neighborhood the same day that I had been at the velodrome and he'd flipped over his handlebars and broke his collarbone.
He actually had me for a lesson, though, which was a real change of pace as he used his voice rather than the bass, but I can't imagine being told I can't play for four to five weeks.
Long story short: He looked at me and pointed to his arm in its sling and said "Don't do anything stupid."