Everyone is being really supportive, and I will too, but just make sure you are doing this for the right reasons. Don't apply for the Marines just to be an NFO and because the Navy rejected you. Theres a lot more that you'll have to do other than flight school in P'cola to become an NFO in the Marine Corps. One thing includes six month of TBS. Also, Marine Corps OCS is a LOT different than Navy OCS. Theres many other aspects that are different also between the services. Maybe some other experienced aviators can also tell you about the differences that are there once you get to the fleet.
Good luck.
Good luck.