How to place a blog from WordPress in HTML landing without a header and footer?

Question

CMS

Created a cool landing page in HTML using the constructor. We decided to add a blog, the most suitable option is WordPress. At the same time, there is no understanding of how to integrate it there correctly, namely, remove the header and footer of the blog, leave only the content part and insert it into the landing php file.
Tell me,
1. How to remove the footer and footer in WP?
2. What are the options for inserting the contact part of the blog?
For myself, I single out two options so far - iframe and code. It is not clear with the code, if you describe how to do it in detail, I will be very grateful.