Nut and bolt, Huawei
I swapped just the mouth of the other photo because I liked his eyes on the no. 1. They are all looking at the camera.
With all of the recommendation of Vintagesnaps, I suggest a bit of post processing would help a lot.
Here's another version
[ATTACH] Here's an edit.
Why does a bigger sensor lead to a shallower depth of field?
Before anything else, try reading your owner's manual and learn all the switches, dials and buttons and what each, does.
Know your camera and...
I wasn't looking. but Ysarex posted it already. :)
I came across these lectures but haven't actually viewed them. You might find it interesting.
Lectures on Digital Photography - YouTube
If you don't have raws, use levels and click the middle eyedropper and click on the white bg and adjust the black and white points.
How about this?
I'd put a light shadow on the wall to separate her from the wall. She looks like she's painted on the wall, part of the sign unless you see her feet.
[ATTACH] How's this?
Something like this?
Separate names with a comma.