In WordPress, you can determine which part of your post gets displayed in the home page as teaser to the full article. You can either do this using excerpts or the more tag.
I suggest you use the More tag: <!–more–> . Itâ€™s an easier way to customize the length of the articleâ€™s teaser in the home page. You can do this with excerpts but you have to edit the main page to replace the_content with the_excerpt to display the excerpts of the blogpost. Thereâ€™s a plugin available in this site (external link) if you want to use excerpts.