It's hard to tell that these are your first street shots, I have to say - For me, confidence in the streets comes and goes for me, one day I can be very brave and very proactive with getting my shots, another I barely have the guts to shoot from the hip.
I find the trick is to get yourself into a positive mindset, smile, walk in a brisk pace (but don't be afraid to stop) and generally treat otherwise familiar locales as new, fresh experiences. Having time is also a great factor, I usually make the mistake of trying to cram in too much photography in my goings from A to B, which is nice, but dedicated outings is so much more rewarding. Also, even if you don't intend to take pictures of people, talk to them, approach them - Make yourself visible as opposed to trying to stay invisible, whilst you are visible, paradoxically enough, it is easier to sneak off a shot or two in the direction of an interesting subject. It is an art form in itself to remain stealthy whilst not appearing to be so, but don't focus on that too much... Just enjoy what you are doing, and try to extrovert that sense of enjoyment and openness - You are taking pictures of people, the least you can do is try your best to give them something, however small or insignificant in return. Point in case, the Gary Winogrand video (at 3:12) a woman asks him "What's happening?" as he takes a shot of her, he laughs and says "I'm surviving, you know", perfect way to "diffuse" a situation.
Finally, I have to say once again that it is hard to tell these are your first street shots, very nice moments, especially 1, 4 and 5 caught my eye. I have a few ideas of post processing, but I won't mention them, I find myself projecting my own tastes unto others too much in my "criticisms".
