I started to learn Angular 2 recently, can you give me some advices?

Goto mva.microsoft.com they have good materials on pretty much everything.

Check out Angular 4.

There is a good tutorial (Hero tutorial) in Angular docs. Check that out.

Don't worry about @Letmecode, he's a well-known angular hater. 😉

Having written two production apps in Angular 2, my advice is:

BAIL OUT (and learn Vue or React instead.)

Granted I lost all my faith in Angular because we started the apps during the RC stage, which was a total nightmare, especially the router debacle.