Hi Dorian - I wrote a tutorial on how to integrate Chargebee @ Integrating WeWeb With Chargebee [How To Guide]
The big benefit to Chargebee is that you can use a wide variety of payment processors, once you go through the integration I wrote in WeWeb, it’s as simple as enabling whichever payment processor you’d like in the Chargebee platform. This is probably your easiest path to get this working.