Not a forum, but these folks put out some great information on their podcasts. Very down to earth, pragmatic and really know their szchitsky.
I've spoken with Jason a couple of times over the years and he spent a ridiculous amount of time (and patience) answering my greenhorn questions.

https://www.youtube.com/playlist?list=PL_Bc9brTTLBG9xrNc1zyWUASHu3AHkVtd

[Linked Image from i.imgur.com]

WWP53D