I hosted Simon Gawesworth on the beaches of Cape Cod so can attest that there is some coverage of beach casting on his epic video.
However my recommendation would be to spend time with someone who has done it a lot, or hire an instructor.
IFFF Certified THCI @ 2005
Capeflyfisher Guide Service
Island Hopper, Guitarist, Incurable Dreamer
and Founder, Worldwide Flyfishing Forum