Hi @sroka87, some good shots here

For the first shot I applied an auto upright correction in lightroom. I lowered the exposure slightly, boosted the contrast and the clarity, and applied a selective vignette to the closest couple in the image. I also sharpened it slightly.

For the second shot I straightened the horizon, increased the contrast, boosted the shadows and recovered some of the lost highlights in the sky. I also increased the vibrance in the image and gave it a slightly warmer look, a selective vignette was again applied.

For the third image I used a closer crop, I recovered some of the highlights, and decreased the red saturation in their skin. I improved the overall sharpness and clarity and boosted the contrast. It's important to note that you missed focus on this shot. To ensure the foreground and background are both sharp use a shorter focal length/ stand further back from your foreground subject, use a smaller aperture and focus about 1/3 of the way to the horizon. This should allow you front to back sharpness.

Your overall composition and subject selection are good. You're effectively using leading lines in your images and you obviously have a good eye for conveying emotion in your shots. Keep practicing and focus on sharpening your editing technique, I'll be interested to see you future work. Cheers for now.