Move title from header to main content

Situation: I’m using a child theme. I’m using the classic editor for most pages. I have thousands of pages so it needs to be automatic.

It seems very simple.
I want to have the title of the page moved from the header area to above the main content, so next to the sidebar, and I want to style it in a certain way (like on the screenshot)

• This topic was modified 14 hours, 23 minutes ago by sudhafen. Reason: Added working screenshot
• This topic was modified 14 hours, 18 minutes ago by sudhafen.