This requires patiences and time. Not only that, practice. But after a while, you'll get the hang of it!

I open the image that you want and add the image of who I want in the edit. DO NOT press the check mark. First, I studied the images and I realized that Barry's (or Grant's) has more highlights than Malia. So, I deleted the added picture and I adjusted the photo so Malia can have a bit more of a highlight. 

Once I adjusted that, I added Barry and I wanted him to be behind Malia. So, I pressed the eraser, and erased what I didn't need. Press the check mark when done.

This is optional, but I think this makes it look more natural and more realistic. Under the Effects tab, I found a black and white filter that I liked. Film B&W is the one I used, because it allows you to adjust the input and output. If that's the one you're using, adjust it how you want it. Press the check mark when you're done.

This is also optional, but I think this makes everything blend in. Go to Effects and find the blur option. Find the one you like, and adjust the blur. Press the check mark when you're done.

Again, optional, give the photo the final touch by adjusting it. You can do that by pressing tool then adjust. Press the check mark when you're done.

AND YOU'RE DONE!

FONT I USED:

Names: Will & Grace

Author: Saint Andrews Queen