Convert http to https

Try reviewing:
https://make.www.ads-software.com/support/user-manual/web-publishing/https-for-wordpress/
https://www.wpbeginner.com/wp-tutorials/how-to-add-ssl-and-https-in-wordpress/

Also check out this plugin: https://www.ads-software.com/plugins/really-simple-ssl/

Hello @stratosmaneas

First of all, you need to check with your hosting that SSL is enabled. Further, once the SSL is enabled, you can change the URL from http to https through WordPress Dashboard Settings >> General
Wordpress Address & Site Address.

In case you wish to force the User to redirect them to Https, you can use EASY HTTPS REDIRECTION WordPress Plugin or do that via .htaccess file

Let me know if this info helps.

Thanks.