If you are new to WordPress, wpbeginner.com has a set of tutorial video which walk you through the basic functions of WordPress. It is probably the best starting guide after you have installed WordPress on your own server or got your a free site setup on wordpress.com – it does not cover WordPress installation.
To get the maximum returns from the video, put aside at least one hour to watch the first 10 video and practice what you have learned before you continue on the remaining video.
The quality of the video is excellent and well polished – well done to wpbeginner.com!