In my comments, Sandra asked for more info on how to do a double exposed photo. First off she mentioned what program I used. The only program [software] I have other than the Windows Paint which I never use, is one I installed with my disk...Paintshop Pro. This I use for resizing my photos to have them small enough to load on my blog quickly and yet large enough to view details. I also make my own photo frames, watermarks, and my own blog headers, etc. etc. with this installed program. [by the way, each Windows 10 update, I have to reinstall it! I hate that...Windows ALWAYS takes it off my computer upon updating!!!] Just another glitch with Microsoft. Makes life interesting, I guess. Okay then, moving on...
This is free an unlimited. My result from taking you through the step by step 'tutorial' is this below. I chose a dragon fly and beach image...

Hope this helps anyone interested in how to let the computer do the work for you. I could also tell you how to do your OWN version thru Paintshop Pro, with layers, but that's a whole 'nother process.