WordPress Blog Post Template Overhaul

I'm looking for a skilled WordPress developer to update and create a blog post template. The project involves adjusting the layout and adding new sections. Currently (see uploaded photos) I had a designer help me, but each blog is just a large text box with a white background. The text formatting looks basic and unappealing on all devices. Also, I don't have an exact template that I can just use every time I want to write a post. I'd like to have two or three templates to select from each time. If possible, I would also love someone to help get KIT better connected and working with the forms, etc.

Requirements:

WordPress expertise
Experience with blog template customization
Ability to design new sections based on my needs
Possibly support integration of Kit through forms