Getting started with Flutter - Breadth+Depth approach

Hey makers,

Would appreciate your word on how to get going fast+strong with flutter to both launch fast, and get strong with the fundamentals.

Background: I'm definitely comfortable with Python and R (datascience background). Okay understanding of the web.

Goals:.

1. Be able to launch mobile apps pretty fast (obviously will get faster with practice, and probably slower at the beginning).

Specifically: get a super simple downloadable app by the end of this year.

2. Create strong fundamentals so I can later on work as a flutter dev.

Gameplan: (would appreciate feedback here).

1. Quickly go over intro materials:
   1.1 Specific flutter materials (depth):
   https://classroom.udacity.com/courses/ud905/lessons/92a39eec-0c04-4d98-b47f-c884b9cd5a3b/concepts/35329ea0-ef26-4edf-bb85-5d2e9667eed5
   and
   https://www.youtube.com/watch?v=1ukSR1GRtMU&list=PL4cUxeGkcC9jLYyp2Aoh6hcWuxFDX6PBJ

1.2 General OOP, patterns, and principles (breadth):
Go through Berkely's CS61B, along with Java Head First.
https://inst.eecs.berkeley.edu/~cs61b/sp20/

2.1. Continue to Angela's The Complete Flutter Bootcamp for 2020:
https://www.udemy.com/course/flutter-bootcamp-with-dart/

2.2 Start building the app I have in mind in parallel to this course.

I'm assuming this is a bit wide and pretty comprehensive, but I need depth (launch) and breadth (build skills to be able to launch fast and strong multiple times later on).

Many many thanks!