Recommended backend for REST API and tutorial with ionic?


I like the fact that developing with ionic allows me to create a website and an app the same time.
I m looking for a complete tutorial to set up a shopping cart system and implement it with ionic.

It’s so painful to piece things together. As a beginner it’s just overwhelming.
I will at least hv to understand REST API and work with ionic, this part sounds achievable, but then to create a backend/data base for it is again another story…

So I was hoping to see if anyone here could find an up-to-date full-stack online tutorial out there I can pay and learn from it. I know HTML CSS and some javascript, so I can skip the basics, but the backend/database part and how it integrates with ionic… I felt weak on those areas…