iam just like u i perform for friends of friends and friends of family and my teachers at school but i cant go out and perform for strangers :S thanks for help
Here's the problem, you are affirming to your self that you "CAN'T" do something when in fact YOU CAN. You simply lack the nerve or "confidence" and that condition will haunt you until you kick yourself in the hiney and get out there and, as the Niki commercials say, JUST DO IT!
That Said I would detour you from the guerrilla tactics so many have started using these days, its a really good way to get slapped or punched in the face not to mention ROBBED should someone notice how busy you get and the cash that gets tossed in the hat. So play it safe vs. stupid. Respect the people that are in the area and simply start with material that grabs their attention. The old gag in which you have a bit of of money ($5.00 bill) on the ground and you're trying to catch it yet, it moves each time you get close to it. . . it's just a bit of thread work but it's funny and people never fail to pay attention and will route for you to win in your pursuit. . . follow this up with something that's personable but related to the money thing, say maybe a Miser's Dream. . . something that will pull more people into your performance circle but likewise draw them in emotionally, into what you do. Help them to become A PART OF the bit. There's a thousand ways of doing this, especially if you are good at manipulation.
If the desire is there all you need to do is find the niche that fits best to you and your offering. It may mean studying a bit more and creating routines appropriate to building the tip. In busking you must first build the tip, hit them with a short 15-20 minutes of silliness that is an expansion to the first part, deliver one really "big" bit of business and then suck them in for the money part. . . this is typically done by deliberately "borrowing" a $5.00 or $10.00 bill from someone and running a routine with it closed by the joke "This is the bill you GAVE me, yes?" and when they confirm, say thanks and put it in your pocket. You follow this almost instantly with your pitch and passing the hat but silently AFTER you've appealed to folks, you offer the victim back their cash. . . usually they'll decline and let you keep it. Make a big deal of this by showing off the bill as you very deliberately place it into the hat and move on from there.
Best of luck!