How to make an application run "online"

[Daniel Tkach]

Hello group. I started learning Python about a week ago. I have a few years of experience with other languages, mostly Pascal and C#, and I've always programmed for desktop, so I'm a bit clueless when it comes to web programming.

So I was able to pull off my first working app with Python using APIs YAY!!! It feels so great, like I control the whole internet LOL 
What my little program does is it uses Shopify API to get the orders, then using a lookup table that I have on disk in a .csv file it calls a webhook on another platform called Kajabi where the user gets added and activated, where he will be watching the live videos he purchased at the Shopify website.

What I want to do now is to automate it completely, I don't want to have to run my script, I want the Kajabi product be activated for that user as soon as he checks out on Shopify and there's a new order, and I want this not to depend on my computer.
How do you do this? Where do I start?