A good portfolio layout option?

Been searching the net for ages trying to find a way to do my portfolio section as i want, but i can’t find any tutorials on it that really help me.

I would really like to get it like: https://wparchive.com/

I just dont know how to get the main portfolio.php page to display thumbnails of all the work and be able to click on each one for a larger view with the discription of the work.

If anyone knows of a tutorial i can follow and change to what i want that would be great, as this page is starting to really annoy me and i want it finished.

Thanks.