I know someone who made a very nice post for that.
Try the search function on the forums.
Well, it’s just what u think of it. Like u stated for the tags and how they work u just type in the search box" how to use tags" and voila, there are the results.
If this post is just about a possible lack of documentation on the Athom site then i would suggest u send them a request for just that.
If it’s about not finding any info at all anywhere then , well, this forum is full of info! U will be amazed!