Learning React as an AngularJS Developer

React isn’t a framework

You use Angular, so you probably like frameworks. React and redux are not frameworks in the same sense as Angular. You can use React Redux Starter Kit and/or Redux CLI to get a React/Redux app set up with some sensible defaults, though.

Replacements for other parts of Angular

Understand the component lifecycle methods

Best resource I’ve found is Understanding the React Component Lifecycle

Get a good authentication library

I recommend redux-auth-wrapper.