I would advocate for AngularJs for Typescript. There isn't match difference between the two other than typescript needs to be compiled down to JS.

With typescript however you get a few advantages

1. As much as the AngularJs developers are providing both documentations for Angular for Javascript and Angular for Typescript. They are leaning more on typescript than javascript. Hence more support for typescript.
2. Typescript been a superset of javascript ensures that it implements most javascript features in due time before a javascript standard comes out. This ensures you don't have to struggle with learning new features for javascript. And with every newly released ECMAScript version Typescript will always have more documentation.

most of the angular structure will remain the same.

With Typescript, you will need to compile them down to JS for most modern browsers.

As for learning...how familiar are you with Javascript? if pretty good, go with angular TS. i find those that try to learn angularTS without good JS knoweldge struggle