Masonry has some built in options for that, if you open a staff account for email@example.com we can have a quick look. As far as I remember you are able to add images with the help of the link lists consisting of links to pages, it is in the theme settings. Clean Themes have a good customer support by the way, let them know too.
If you decide to let us look please send the link of this page as a reminder. I hope this helps
I am not sure how to explain it here, you will have to change a lot of things it is not really simple.
If you need that sort of look I would really suggest using Masonry theme anyway. If you cannot figure it out how to implement it, then you will work with a developer which will cost much higher than just purchasing the theme.
If you just want to list your collections on a page this may a be solution for you, see the link below
You have great photography and amazing products. Slide shows are really cute and all look great :) I encourage you to look up for other themes on Shopify theme store. A great theme can help you sell more
I hope this helps
@Anna21 @Outer_net - Just to tack along, this is not an "app" and definitely requires custom development to implement. Would strongly recommend hiring a developer to knock these out as that will also assist with troubleshooting if something comes up (most masonry plugins are jquery and can break easily :(
Hope this helps!