Changing Blog Layout:
This will be changing how the cards that display your blog’s postings operate on your theme.
From either your dashboard (appearance > customize), or your site’s admin panel, go into customize.
Then access your theme settings.
Once there, access your Content Archives settings.
Under Select one of the following, you will have two options: Entry Excerpts, and Entry Content.
If you select Excerpts, the cards will display a the blog text up to a certain point. This is like a preview into the blog posting’s content.
However, if you choose content, you allow the full text of the post to be visible.
This will not change any factors of the blog posting on it’s actual page however, so you can still style this however you choose: