Install WordPress locally or on a web host first.
Use a bootstrap theme in WordPress
When you are comfortable working with coding, you can use a startup theme such as Underscore, which is just the elementary, unstyled coding needed for a WordPress theme, and you can enclose the coding with the correct HTML for the bootstrap. The Bootstrap works with a 12 column system and you would be nesting your HTML tag this way.
Hint: Normally the opening containers are in header.php and the closure of this containers is in footer.php. However, you can adjust it as you wish. "Containers" "Row" "col-md-9" "col-md-3"