Help with portfolio page template

Hello again,

I would like some help to create a theme for the portfolio page, I saw that this website uses your theme: https://bit.ly/2HQtxIW

1. I would like to do something like that. How could I do it? which elements to use?
2. After creating this page, is it possible to just duplicate it and change the images so that I don’t have to redo item by item again?

Thanks.