go to FB for the active community of over 700 members mostly Oregon focused, with name of oregon freediving and spearfishing. This forum as abandoned years ago.
For Washington state, there's a FB group called 'Washington Freedivers'.
For BC folks there's 'BC Spearfishing & Freediving'
For Norcal there's Norcal Freedivers and many other groups in Cali.