Customize → Category
This is category page eg :Category Demo in here you can setting layout of this page
So when you in the Customize then you should click to Category
Then click to the Blogs Categories.
Please back to Widgets → Blogs.
You can setup form newletter for yourself Widgets → Blogs → MailChimp for WordPress
Please back to Widgets → Footer Top.
You can change Id ,Name that you want follow
Please back to Widgets → Custom Copy Right.
You can setting layout posts for yourself
or you can use post layout with sidebar layout e.g