I would first research what breakdancing or bboying is all about wikipedia, google. learn the history and where its at now to have a better understanding for this topic
Im a beginning bboy and im not good at all but its really fun and worthwhile. So the way you wanna start this is first learn upper footwork such as a uprock or toprock. then a transition into bottom foot work such as 2,3,6,9 step, cicis, and other cool little things you can think up to
create style. After that you would also want to learn freezes and different stalls. Finally. you wanna get some power moves such as you see in movies and other clips. some moves include the master swipe, windmill, flares, air flares, air traks, head spins.
bboy is all about style. Of course you can use it to show off and create crowds of people that praise you, but what most bboys will tell you its all about the battle.
What i suggest is videos and people that also know how to bboy. I learned alot from youtube and after i got the basics down i just spend time forming my own style and moves. its just like stringing or sticking, you can learn basics but further on you wanna create your own flow.
Ill start it out. heres a pretty good tut on toprock
by the way. thats not me.