Removing block preview & read more at the end of the post

Thanks for the info,

Check this one.

  1. From you Admin page, go to Online Store > Themes
  2. Select the theme you want to edit
  3. Under the Asset folder, open the main.css(base.css, style.css or theme.css)
  4. Then place the code below at the very bottom of the file.
.blog-post-card__info p.blog-post-card__excerpt, .shopify-section.shopify-section--prev-next-blog-posts {
    display:none;
}