Composite of two photos – how can I adjust the colours?

Question

I'm a Photoshop newbie and I am having trouble achieving a specific effect for a composite. I started with these two photos:

I want to achieve this:

I was able to cut the girls out and kinda blend them with the background but I have no idea how to adjust the colours. This is what I have so far:

Answer 1

I like to use the Camera RAW filter in Photoshop for such colour toning. It's good because all the controls are in the one place, and using the filter on a Smart Object is non-destructive.

Select both your layers, and go to Filter > Convert for Smart Filters. Then do Filter > Camera RAW filter.

As a starting point, use the following settings in the Basic tab (left) and Split Toning tab (right)

Here's the result - of course you can continue to tweak the settings a little until you get the desired result.