I found out that apache had built-in support ( via a module - mod_md ) for automatic TLS certificate management with Let's Encrypt since October 2017.

Bloody Hell! Why didn't I hear of this sooner?

So, I ran off into my cloud to set up this so-called ManagedDomain ( mod_md ).

Found the module in the package repositories, installed it and started testing it out.
I started writing IfModule conditions under mod_ssl so that I wouldn't have to overwrite my existing TLS configurations ( which was already issued by Let's Encrypt via certbot, by the way ).

After a whole night of twisting and turning with the configurations, it turns out that the module in the package repositories were built for ACMEv1 and that API has been dead for as long as the module has been around.

I had noticed that the module was 'experimental', but I still hoped that they had the packaged the module.

Finally, I cozied back up with certbot. At least, until this so-called mod_md becomes stable and mainstream.
I hope certbot doesn't make a fuss. I'm sure, it got offended that I was trying to cheat it with mod_md.