Photoshop Practise - Merging Images

I used this Photoshop tutorial as it seemed simple and explained things very clearly. However there are a lot to chose from, but this posed as the best option. 

I first selected an image of our main protagonist from our filming, I chose this shot as he looks to the side, and I imagined this to prove effective when placed along a skyline.

I wanted a quick skyline image, it proved to be hard to find an urban skyline, without using our own for this practise. So I took this one off Google to work with.

I had to select the image, according to the tutorial it was okay to select this image roughly so that I could work with it better later on. 

I then edited the image by selecting the smart radius on the edge direction, this made the background image completely disappear, and I was able to play around with this so that my image was clear.

I then edited the contrast of the image so that the orignal colours wouldn't be lost. At this point I could already see probelms that were arising. I decided to carry on and see the effect of this on my final image, therefore I could learn from this, and not make the same mistakes in my final editing piece.

I then had to change the output channel to this, so that the image of our protagonist would appear - as a new layer - isolated from the background. You can see this effect in the layers panel down below.

I then pasted the image of the protagonist into my sky line image that I had open, I free transformed this so that I could make it fit in much more effectively.

I tried various ways on the background, flipping the main protagonist and moving about before I felt that I created an image where it looked like he overpowered the skyline.

This was a very rough attempt at merging two pictures together, but I now feel as if I have the confidence to do this effectively in our final image.