I looked at about 50 images. Honestly? Your B&W images during daylight look muddy. A few have better, crisper tonality, but a lot of shots that should look crisp look flat, based on the subject matter and the frank, candid, "street" approach and subject matter. I see a guy who has GOOD vision...VERY good instincts, and is not afraid to shoot on the street. I saw a handful of images that are VERY good. Out of fifty, I think the percentage of keepers was very high. Even your more-marginal shots are better than what many people can achieve. People seem to have a good relationship to you. Your timing seems good. I see tremendous potential. If you keep shooting this way for another five years, or ten years, you will have some truly fabulous images, maybe enough for a book.
As for advice, there is a rather lengthy video hosted by
B&H Photo of a guest speaker they had. he detailed the technique of shooting street subjects at intersections of light against dark, or dark against light, with superb examples. When a person on the street is shown against a light or dark backdrop, they really,really stand out. That's a simple yet reliable way to visually direct the eye to a specific area of the frame, and it manifests itself on the street in what I used to call "
the lighted side" of the street, and "
the shaded side of the street". When I was in my early 20's, I shot street for about three years, around 30 some-odd years ago. I knew then that if I walked on the sunny side, I would automatically have a dark background on the opposite side of the street, and vice-versa. I think you need to consider that principle when you actually go out and walk and look for shots.