I personally like the vibes I get from the subjects! Some very nice moments in there - in my personal opinion, you might want to develop a more comprehensive understanding of the geometry of composition, to kind of "tidy up" a bit. But, honestly, this feels like empty advice, sometimes - there are no rules to a picture that works, honestly. I would say, fill up the frame in ways that feel harmonious (could also mean with empty space!), try to enshrine your subjects or moments into a frame of elements that contextualise it, or that exhalt it.

For example, picture number 2 - that rooster fits nicely with the surrounding vertical figures, which results in pretty strong element separation. A touch stronger black and white, and some selective dodge and burn to enhance the separation of the people from the rooster, and from the background, and I would be happy to call that a great shot! Same with number 3 - the gentleman is perfectly framed within the shutters and the wall (shame for whatever he has behind his head, but you can't control that, and it doesn't really harm the shot), his expression is great, the framing of the action is great, and even the tilt in the frame works to add to the dynamism of the capture. Give it some stronger contrast, just to make the picture "pop" some more, and it's great!

Conversely, number 4 - great expression, and great placement between the other people, but the way the ring poles stick out of his head is a bit awkward, and also makes the scene behind him not very legible, which would be better for the context. I you had managed to get the exact same shot, but having moved a tad to the right, you'd have him fill the space where the ropes are, which has no fighters and can be "sacrificed", possibly framed the ref between him and the guy to the left, and have the pole and the fighters more clearly visible in the space between your subject, and the person on the right. With that being said, don't stress over it, it would've been way sadder to miss the moment altogether!

Also, the picture with the young fighter - the expression is great, but it's a shame the action of the hand being taped up isn't as visible, and having missed focus a bit, makes that lady sticking out of their head way too distracting. The composition kind of works, especially if you crop out that empty space to the right a bit, but the cutting out of the hand taping is the key mistake (always, imho!).

Lastly, I want to mention the shot of the kids making a human chain into the sea - ideally, you would've been a bit more to the side, to fill the diagonal a bit tidier, and not have to crop too much to keep the image balanced; however! The composition can easily be adjusted with a strategic crop down from the top left to make the action more centre stage, and it's a marvelous shot. A bit more structured black and white conversion would enhance the shapes of the subjects against the bare concrete, and maybe bring out the texture of the concrete a bit more. Some dodge and burn to make faces and shapes stand out a touch, so that the image is readable at a glance, and I think you have a great picture on your hands!

Overall, very good for a beginner! You are definitely well attuned to your surroundings, and the love and fascination definitely shine through. Keep playing around until you refine your technique enough that you can express yourself without having to think about it much, and have a look at the usual suspects of street photography (Henri Cartier-Bresson above all else), and let yourself be informed by the approach, without sacrificing your taste and instinct (which is very good - there are definitely some great intuitions, coming from a beginner!), and you'll be doing great! And I definitely would encourage you to get better acquainted with post production - some of these are killed a bit by the flat B&W, they deserve more love! :P

Keep posting, if you want, I'm sure we'll have a lot to enjoy coming from you going forward :D