Merry Christmas to you too, GrannyQ! Perhaps your photos won't upload because they are too large? When you browse and find the photo you want to upload, right click on it and then scroll down to "resize pictures" and left click on that. A little box will open with sizes, and you need to choose "small" and click OK. Then a new smaller version of your photo will open and you can upload it.
This site is really picky about taking small photo files only.