There's really no need to start over.

Take a deep breath, go out into the world, and look for one of the FATEs in a low level area. Practice a bit in that, get a feel for the game again, and you'll be good to go in no time.

There is no easy way of transferring your gil or items; you will need to use either the shared chest in a Free Company, or another player whom you trust not to just take your things and run.