Keep in mind if all you have is photoshop, then that will work. It is just better to do in the other apps.
- Start by creating a document the same size as the page it will be printed on. (keep in mind, that you may not be able to print to the edge. That depends on your printer)
- File>Place then select your image(s) for the flyer
- Arrange them how you like (you can use guides or alignment tools to help space them evenly if necessary)
- Use the type to to create your text, each line of text will be on its own layer except for the body type. (that is a paragraph or more of text)
- The area text tool is used for body text.
Do what you can save a jpg or png and share it in this thread for more help if needed.