I tried searching the internet and the forum itself, but I did not find anything very clear and straightforward for my question so I thought it was good to ask around here because it might be the question of some.
Recently I started to delve into the web and, among thousands of frameworks and libraries, I opted for Angular. Recently it has had a new build (version 6) but there is not much content related, at most there are courses that teach angular 2, 4 or 5 and in the appendix of the course they show the changes to Angular 6. My question is simple: I can deepen in previous versions and then learn the news of 6 or is it worth waiting for something related exclusively to him?
UPDATE: In the future I want to delve into the MEAN scheme, so I started with Front, then I'll go to Node / Express and a non-relational Mongo bank. Also I noticed the Ionic framework for hybrid applications and I saw that it is possible to integrate it with my Angular-Cli project (but only from Angular 2 for using TypeScript, which makes me not want to go deep into 1).