configure ssl nginx wordpress and how to nginx.service: Failed to read PID from file /run/nginx.pid: Invalid argument

mkdir /etc/systemd/system/nginx.service.d
 printf "[Service]\nExecStartPost=/bin/sleep 0.1\n" > /etc/systemd/system/nginx.service.d/override.conf
 systemctl daemon-reload"

tx to https://www.digitalocean.com/community/questions/unable-to-start-nginx-failed-to-read-pid-from-file-run-nginx-pid

for configuring ssl for wordpress and 

https://www.greengeeks.com/tutorials/article/how-to-install-a-ssl-certificate-on-your-wordpress-site/
for the above how to