Good morning!
As far as the "learning curve," a big portion of X3 is understanding the GUI, views, buttons, etc. The Reference Guide is a best "first" source for a new user, since it has chapters dedicated to tutorials.
This thread has a lot of things discussed for new users.
As far as "videos"... in the interest of "time" it may be more useful for you to play with the tutorials, then think of "what I want to do" and go from there. At that point you can better target topics for videos, references, or even in the forum.
IMO, videos can be time consuming, and unless you are actually touching/doing things with X3, you may end up remembering you "saw it somewhere" but then have to find it again.