Hi Kingsley,
You should be able to disable the content title in the page editor, it’s located at the bottom of the tool bar on the right side.
Your home page is a static page, so you can build it as you want.
I would recommend installing GenerateBlocks plugin to build the layout.
You should be able to add background image and background color to a container block.
For the email subscription you’ll need subscription plugin, those plugins would give you a shortcode so you can add the shortcode to a shortcode block.
Let me know if you need further assistance 🙂