1) You edited the main header file and the page is messed up. Copy this into the header file, and it should return to normal.
2)For creating a child theme, install the plugin ‘One-Click Child Theme’. Its literally a click and you get a child theme. The child theme should now be selected as the default theme.
3) Now, login to your hosting provider account(not wordpress), and go to the file manager(where all your website files are).
Navigate to Corpo main theme folder. Mine is
public_html/wp-content/themes/corpo
and find the ‘header.php’ file. Copy it.
Now, go to the Corpo-child folder. Mine is
public_html/wp-content/themes/corpo-child
and paste this file over there.
the file, but,
it. Save, and close.
4) Go to your wordpress dashboard. Navigate to Appearance > Editor. By default the corpo-child should be selected. If not, then select it. You will see a ‘header.php’ file there. Paste this into it. Look at Line 16, and modify it as required. Save and check it now. Hopefully it should have worked now.
There might be another, more convenient way to do it, but, I’m myself a n00b and this is how I did it.