Devian Art
view link www.deviantart.com/ has quite a few tutorials on Apophysis made by members. I did a search there for "apophysis tutorial" and came up with 3873 links - didn't look through all of them though, LOL :)
Here's a help file you can download that one of the members of Devian art created:
view link cmptrwhz.deviantart.com/art/Apophysis- Help-File-v1-04-105243195
"The apophysis Windows help file downloadable thru the download button. I have included instructions within the zip file to be able to open the file for Linux users and Apple users."
Here' another tutorial from a different member of Devian Art: "Tutorial suited to explaining much of the interface that isn't documented as well as helping anyone who is new, and probably quite a few things veterans can go ahh! to, learn to make quality renders and clean up their images before and during rendering. Also explains each individual render method, among many other things."
view linkdatagram.deviantart.com/art/Apophysis-2- 02-FAQ-Tutorial-11469484
Here's a link to the Apophysis forum at sourceforge:
view link sourceforge.net/projects/apophysis/ forums/forum/434216
Hope these help!