I want to create my own text header

index.php file works for blog page. Put this title above loop in the indx.php file of your theme.

Thanks for the reply. I am a coding noob, where can I find the title loop?

changes should be made in a child theme; https://codex.www.ads-software.com/Child_Themes

your blog posts seem to be using the template file blog.php – consider to edit that.

for details, please ask in your theme’s forum at https://www.ads-software.com/support/theme/leaf/