No coding.
Simple to follow.
Under 10 minutes.
The above YouTube guide can help you with how to make website secure by obtaining and installing free Let's Encrypt TLS/SSL certificate. How to redirect website from HTTP to HTTPS. How to convert PEM files to the same certificate.crt, ca_bundle.crt and private.key files donwloaded from SSL For Free and ZeroSSL.
Text to save in .htaccess file:
## HTTP to HTTPS REDIRECT ##
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [L,R=301,NC]
</IfModule>
