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Thanks ... and btw, welcome to FM and the PC Forum.
Overall, I think you've got an eye for composition that shows promise of things to come ... that will carry you a very long way, imo. By & large, the rest become technical (or artistic / aesthetic choices) matters at how to present what you have captured in your vision.
The three images you posted, all seemed soft/fuzzy to me. I'm guessing that is a product of the downsizing / posting processes. It could also be an issue of undersharpening, low contrast / low resolution lenses, or poor processing. Hard for me to say which it is without seeing the original raw/sooc, but just be wary of those factors along the way.
The B&W seems to contrasty to me, but it also looks kinda "infrared", so I'm not sure if it is too contrasty or is supposed to be that way. The flower lacks detail, but that is back to that soft/fuzzy thing, so not much else to say on that at the moment. The one I worked on seemed to suffer mostly from low contrast.
I remember when I first started processing raw from my Canon 1D Series cameras ... they all looked like mush compared to what I had been getting out of my D70s before. The point isn't about the camera per se, but that I had to learn to process the captured image ... otherwise, I was leaving a lot on the table.
We'd all like to think that for the $$$ we spent on our camera, that it will chunk out exactly what we want our pics to be like after we push the button. While most people have long accepted the concept that models don't really have flawless skin, but that "retouching" was used for the final image ... very few give credence to a concerted effort @ post processing (i.e. finishing) as being critical to taking a captured image into a finished product.
It has been a rather rocky road, love/hate relationship for me with regard to learning my PP techniques, etc. but I'm a throwback dinosaur at how I approach learning, cause I always want to understand the theory of why something works and that takes longer to to learn, but my point is that learning about processing the image after you've capture the image can be as important as learning how to capture it.
In the old days, our film selection was responsible for our image's (standard) processed profile. Today, we have infinite options in digital regarding how to profile and process our images. As such, we have more to learn in order to have more to gain ... i.e. love/hate.
Anyway, welcome to FM and the PC forum ... HTH.