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... (Budget: $30 - $250 AUD, Jobs: HTML, Network Administration, Network Security, PHP, Web Development, Web Hosting, Web Security, Website Management, Website Optimization, WordPress)