It may sound stupid but I try to find a way to modify the blog aspect by default for hours and I cannot find a way to do it. I would like the homepage to be like like your sample blog1 Masonry + full width layout but it sounds complicated.
In the visual composer i located the template button but the home photo is not listed.
Also I would like that by default, the search, tag and category display use the masonry v2 theme and again I cannot figure how to do this change, it seems that by default the theme use masonry standard.
I hope you are well today and thank you for your question.
To achieve this please set your site home page as static home page then configure its settings as displayed in the attached screenshots.