The unknown can be a scary place. Few are those that go in.
Surely you need courage. And courage you shall have.
Gather all your strength and head towards it. You can go step by step. Looking forward to every next step will be less scary than to look upon the whole journey.
But this ghost that is calling you to risk it all, you must follow it. You must go where it leads and find out for yourself. Otherwise, you will be a ghost yourself. You will not be living because you have chosen not to.
Choose life and be on your way. Follow the ghost. It will take you to something that makes you happy or something that makes you sad. Either way, it will be true.