I would suggest that you utilize the Latitude 38 crew lists for your search. You can get the info from their website. Also, during the summer months, many yacht clubs sponsor
"Beer Can" races in the evenings. Their format is that folks who want rides just show up on the docks in their sailing togs, hopefully clutching a sixpack of their favourite tipple and start looking for boats getting ready to go out. The whole thing is very informal and designed to get new blood introduced to sailing.
You will find that enthusiasm and especially reliability
are the factors that most skippers look for in crew, not experience. Experience will come, but the other factors need to be there from the start!
Good luck from an old SF skipper