Looking at just the 2 pictures I personally think you have improved.
your second image focuses on the subject, nicer composition.

- I almost never take pictures of people but some advice can be applied to all subjects

You chopped off part of your sons head, I think your second image could have been improve by stepping back just a bit getting his whole head in the shot and maybe his one elbow.

Try and compose your pictures with the 'story' you want to tell with your picture. If the background isn't part of the same story you don't really want to see it.


I think your lighting in both captures the mood nicely
the first looks gray almost sad like he did something he shouldn't have..

the second brighter colours and warmer tones you can tell he is smiling behind his camera.

Welcome to the forums and thank you fro sharing.