Allan the recent intro was in issue 4773 which I suspect is the one you have already read. I believe there may be a follow up article by Robert. The playlist of videos I linked to earlier contain much the same as was in that article.
Model Engineers Workshop also ran a series of articles a few years ago with a similar trial offer starts with issue No 274 and runs through to 279. Let me see if I can find the tutorial as a download.
As for searching this site click Forums and then insert Atom or Alibre in the search box and you should get a lot of hits.
Also feel free to ask any questions you may have. Best start a new thread and if you can include either Alibre or Atom3D in the title it will catch the eye of thos ethat can help, We have an Alibre staff member who usually replies along with several seasoned users who can explain in simple terms that you don’t always get on the software suppliers own forums. But that is another option Alibre Forum