Navigation includes the following.
• Making your photograph bigger and smaller.
• Moving it up-and-down and sideways.
There are many navigation methods.
You can use the menus at the top of your screen, the options bar/Tool Options, and keyboard shortcuts.
There's no best method for everyone.
Over time, you'll develop a liking for a certain method or a mixture of methods.
There's a lot here.
You may want to go to Navigation Basics.
Let's start with making the image of your photograph bigger and smaller.