Secure My WordPress Info Site

i run a wordpress site and need the following 1- Secure WordPress by restricting /wp-admin and /wp-login.php to approved IP addresses or VPN access while keeping the public website accessible. 2-Renew the expired TLS certificates on 203.143.89.81 and confirm whether the FTP service is required. 3-enable TLS encryption on the mail server at 203.143.89.81. 4-Run the security scan again after the changes and confirm all four issues have been resolved.