I let my Altium subscription lapse at release 10, but recently downloaded their latest release to see if it was worth upgrading.
When browsing for information on the recent additions to the software I came across this sitewhich has dozens of free short "how to" videos on Altium. Even though I'm a long time user (since Protel 2.something) I picked up a few tips that were new to me.
It looks like a great site for anyone starting out with Altium (who used to provide great training material many moons ago but know longer seem to do so).
I've no connection with fedevel the site etc.