In nearly every circle of developers I know, they insist you learn plain, vanilla JS first. Jumping in Angular without knowing what a JS object is, understanding how closures work, understanding callbacks, or understanding how JS's "this" works in detail. All things someone should be fluent with before they go jumping into Angular and React.
Also knowing there's a HUGE difference between Angular (which is a full MVC framework) vs. React (which is just the View part of an MVC framework) is a small, but important detail for someone just starting out.
