Assuming you have cPanel hosting, open your hosting manager, find file manager, from there open the root folder (typically public_html) now in the templates folder open the template you wish to edit and you’ll see something similar to this though it may not be the exact same some key files will be.
layout_header.php contains the coding making your ads show for the most part, you shouldn’t need to open this at all to edit your home page text.
layout.php is a mix of html and the echo of the layout_header file codes. Depending on your template this may contain homepage only content that needs to be edited as well.
home.php is the file you will most likely need to edit, get started by clicking the file and clicking code editor at the top of the page.
Your individual home.php may contain such a variety of coding it's difficult to go in to that part of it here... following the syntax (whether table rows, li tags or div tags) already present should maintain your design if you simply update the text to your preference.