Join the discussions - and remember you don’t have to be a ZAP ’expert’ in order to answer questions about ZAP.
User Group - the best place to discuss using ZAP
Developer Group - discuss the ZAP internals
HUD Group - discuss the ZAP Heads Up Display internals
ZAPCon Discord - join the ZAPCon Discord channel
IRC - chat with core ZAP developers on the #zaproxy Libera Chat channel (European office hours usually best)
StackOverflow: ZAP - because some people only ever ask questions on StackOverflow