beginner in Unity . i want to an array function

Hi, I'm a total beginner in Unity and I'm currently developing a project in 2D and I'm using C#. I want to make a simple gallery that loads images from a folder and each image has next and previous button. So I have 10 images. I know that I don't have to make 10 scenes with 10 Previous and 10 Next Buttons, but how do I do it in C#? .and i do this work using array