Angular is different from React, totally different. For one it's a framework. React is a library. People tend to say Angular is harder to learn then React but I totally disagree with that. I personally found Angular really easy to learn, especially if you look at their documentation at https://angular.io/docs you just need to work through it, step by step. This is not the same with React, again my personal experience. In Angular you have common concepts like observables, subscriptions, dependency injection, separation of concern's, and not to forget functional programming with RxJS. And the documentation that you can find in MDN about html, css, javascript is then also complimentary to it. Overal I found Angular to be a cleaner environment to develop in. And testing is so much more concise.

Anyhow, don't focus on one library/framework. I would even say learn the basics like what you can find on MDN, javascript, html, css, typescript. The rest is always framework/library specific. Let the job decide what you are going to learn first. You know programming, that's great you will learn the stuff they use on the job and in your free hours ;) In my experience you will have to change anyways. For example I have worked at companies, government and private. Where one uses JSP!!!(in 2022, not it was not a government organization) Then Angular, then React.