Convert links using Apache without redirection - apache

Question

I need to convert links from /s/categories/... to /s/blog/categories/... without redirection
For instance, from:
https://example.com/s/real-estate/whatever-else-links/
to:
https://example.com/s/blog/real-estate/whatever-else-links/
Similarly there are few other categories like real-estate that need to be converted from /s/categories/ to /s/blog/categories/
To make things simple I can enter the other categories logic separately since there are few.
Upon some research I tried the following in the .htaccess file that does not work:
RewriteCond %{HTTP_HOST} !^/s/real-estate/([^\.]+)$
RewriteRule ^/s/barcelona-real-estate/([^\.]+)$ /blog/real-estate/$1
Here is the rest of the .htaccess file is as follows:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /s/
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /s/index.php [L]
RewriteCond %{HTTP_HOST} !^/s/barcelona-real-estate/([^\.]+)$
RewriteRule ^/s/barcelona-real-estate/([^\.]+)$ /blog/barcelona-real-estate/$1
</IfModule>
Please let me know how to convert the links at the web server level. Thanks very much.