Need Some Talent To Help With An Upcoming Story (Photo Editing Skillage)

Are you good at making collages and doing banners and stuff for stories? Well I am jealous because I don't think I'm that great. Anyways I am having some trouble with blending pictures...it's really annoying, pretty much I want to put a picture on top of a picture so that it looks like one picture and those people were actually standing together to get that picture taken...do you see what I mean?
I used to use this site called picnic to help me achieve this but picnic is no longer available and I am having no luck finding another site that is easy to use to help me accomplish this. So anyways if you either know of a good and simple website that does this can you please let me know, otherwise if you are willing to do one...or maybe some ;) for me I would be very grateful and definitely give all the credit to you in my new story.
Please let me know guys, I have great ideas bubbling in my head and I need to get them out!!!!!!!

Thanks!!!!! :D