(a very short update)
So today I received an e-mail notifications from Let’s Encrypt service stating that my SSL will expire in 19 days. I believe they will send more emails in the upcoming days, but since I have some free time, I went ahead to go and renew my SSL certificates. Everything went smoothly, but then I kind of forgot which file to copy to which field in IDHostinger’s control panel. I am now really grateful that I had written a tutorial about it in my blog >.< (and apparently it has helped a lot of others too, as it was now my blog post with most views (after my home page) and even a staff from Hostinger contacted me stating that they created their tutorial (which has much better screenshots & styles) based on my blog post. :) :) :)