Okay now you have to edit codes your your theme so make a backup of your theme or copy your theme from Wp content.
Now you have to assign Pages to categories it can be done by a plugin Post Tags and Categories for Pages
Even though the plugin above will assign Pages to categories, and those Pages will show up on your category pages, they will not show up in the stream of Posts on your homepage.
If you’d like them to, then go to your theme’s functions file, and insert the following code. (Appearance > Editor > Theme Functions – functions.php)
add_filter( 'pre_get_posts', 'my_get_posts' );
function my_get_posts( $query ) {
if ( is_home() && false == $query->query_vars['suppress_filters'] )
$query->set( 'post_type', array( 'post', 'page') );
return $query;
}
Don’t forget to create a child theme ?? and let me know the result ??