Trying to place a family member behind his family.

In other words, a family asked for their son to be placed in their photo.
However, the son's photo lacks parts, thus I am wanting to place just his head and some of the shoulder behind the family.
How do I do this?

I've searched until I am blue in the face and cannot come up with a YouTube that show how to do this.
I'm sure I am not asking the search the right question.

Does anyone have a link they like that will do as I described....?

Thanks in advance!

SqBear

When I first got back into photography a year or so ago I had this naïve idea of being a purist. I would see wonderful photographs in magazines and think wow that photographer is amazing. Then I would read the fine print on the number one winner that month and see that he or she had used a stack of 20 photographs and post process them to death in Lightroom and Photoshop. Now I feel conflicted around how much to post process my photographs. Many on this forum make comments like “do not overcook” or “less is more”. To me this reflects personal taste not to mention a bit of photographic snobbery and should not be taken as a cardinal rule for all. Unless we are employed as a photographer by the local newspaper, are we not all artists with our own style. I don’t think any of us should feel guilty when we process a photograph that may not necessarily reflect reality but makes this world a more cheerful place.

Hey pp experts, I have a photo that has a white (cloudy) sky behind a complex structure of tree limbs with colorful leaves. I've looked at a dozen tutorials on changing sky color (to blue) but every one uses a mask from another photo employing erasing or painting to get around foreground objects. This, if not impossible, would take a year (for me) with this photo because of the complex tree structure with lots of sky showing through between leaves and limbs.

I would think there should be a way to isolate part of the photo to be changed and then just adjust/change one of the colors in that part; in this case the white sky to blue but I have not been able to find a tutorial that shows how to do that. I'm using Luminar, but even a photoshop tutorial may help as I may be able to translate the method to Luminar.

Thanks in advance for any helpful answers.