Sign up with the Plum Island Surfcasters. Great group of guys and they are more than willing to help. I joined in the winter and have been learning a lot through them and this website. Their main focus is on that area for for fishing and there are plenty of guys there who fish the Joppa flats as well as Plum Island and Newburtport area.
They also run a Great kids program. $30 covers the entire family for a 1 year membership.
Here's there link to there website
Plum Island Surfcasters
Hope to see you at the next meeting...