Can't access subdomain only subfolder

hello can you please tell me why I can’t access site1.domainname.com
I made subfolder called site1 and I can enter only with domainname.com/site1 which I don’t want also how can I go to domainname.com/home without typing that “home”.

# BEGIN WordPress
RewriteEngine On
RewriteBase /domains/domainname.com/home/
RewriteRule ^index\.php$ - [L]

# uploaded files
RewriteRule ^files/(.+) wp-includes/ms-files.php?file=$1 [L]
RewriteRule ^([_0-9a-zA-Z-]+/)?siteN/files/(.+) wp-content/blogs.dir/N/files/$2 [L]

RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule . index.php [L]
# END WordPress

define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', true);
$base = '/domains/domainname.com/';
define('DOMAIN_CURRENT_SITE', 'domainname.com');
define('PATH_CURRENT_SITE', '/domains/domainname.com/');
define('SITE_ID_CURRENT_SITE', 1);
define('BLOG_ID_CURRENT_SITE', 1);