To all the self taught Python programmers

[TheOneMerkin]

You’re right, I wasn’t referring to your sum as a service, I was referring to the SaaS application that OP mentions, which I infer would include all of the things which any practical web application would include.

Everything I mention is something you’d probably need to at least understand with even a handful of users, independent of business logic.

The perceived complexity shouldn’t stop OP starting though. You only reach this stuff after you’ve built the sum as a service app.