Changing User - Ubuntu 18.04 LTS

Question

I installed mariadb, nginx, php7.2-fpm, ufw, fail2ban, zip and unzip as a root in the past. My site is WordPress.

Now I have added an user with root privilages into my server. I won't use root user anymore for security reason.

1. I changed user:www-data; to user:newuser; in the nginx.conf
2. I run below command to change /var/www chown value

   chown -R **newuser:newuser** /var/www/

3. I changed php-fpm user values:

   user = newuser
   group = newuser
   listen.owner = newuser
   listen.group = newuser

4. I changed PermitRootLogin no and restart SSH

My questions are:

• Should I change anything in mariadb or etc?
• chown values of /var/log folder still looks www:data. Should I change it?
• Should I migrate Cloudflare SSL from /etc folder to /home/newuser folder? Because nginx may not see that SSL?

Anything you recommend additionally? Thank you! :)