Hi, I'm Robert and I'll be helping you with your computer question.
You can put them the way you want them by pressing one and holding it down till it kind of flashes and goes a little gray and then move it where you want. They start out alphabetical but as you add them the list kind of moves because when you download it than it just goes to the first available space
There are also some apps that will organize your apps if you want to go that far
or you can put them in folders.
But for you it seems like if you just move the apps that you use once to the home screen by touching them for a second and dragging them over it should work out well enough for you