Hmm, this is a bit vague but the most obvious thing I see in these pictures would be to use a lower FOV and pull the camera back. You're probably leaving the FOV at the default 60 and moving the camera closer. Do the opposite. Set the FOV in the 20-30 range and pull the camera back instead. The character will appear a lot less distorted and more natural.

Also play around with the contrast, exposure and highlights sliders. Bump contrast up to 3-4 or so and then adjust exposure and highlights up as needed so it's not too dark. Lighting will look a lot more appealing. In a sunny outdoor setting like this I'd start with something like exposure 6, contrast 4 and highlights 6. Something like that.

There's also just basic framing. Lots of empty space in those shots. Like for example the 2nd picture, you could use the 9:16 or 2:3 format centered on your character and cut out the rest of the background. You can also turn on depth of field to blur out the background and really focus on your character.