If there is a big difference between the two pictures, you should first separate the two pictures and make them into the same style, then create a big background and import all the materials. Go to Baidu to find a dividing line between pictures or something, and then use a blur tool or something to make the pictures look more harmonious. Put all the pictures together, just to process the pictures again.

If you want to write words, you can add words at will. Anyway, Mito has enough fonts)