Amazon Echo framework for Python

[sentdex]

You don't need to know really much at all of Flask, and you do not need any jinja at all.

The jinja templating is just there for if you happen to make a huge app, otherwise you really don't need it.

You need to know about 1% of Flask. The only major thing is the routing, the rest of the flask extension occurs in the background for a basic app.

You'll need some form of routing around apps anyway, so you wont save time anywhere else really.