Pre-ordered Saltmarsh - Can I create a game based on the module straight away?

Hi, Getting ready to play Ghosts of Saltmarsh when it releases in a few weeks. Currently getting the group together and organising a couple new players. I have pre-ordered the module, however it seems that I am unable to create a game from it. Is this normal? Am I supposed to create a dummy game, and then transfer all the players to the actual game when it releases?

That is what you would need to do.  Being an official module, it should have Vault Access despite the GM's subscription level, so you should be able to create a Game to host a Session Zero in, then use the Character Vault to migrate the created Characters over to the official game when it's ready. If Ghosts of Saltmarsh happens to release as a collection of Addons, you'll be prepared to add them into your Session Zero Game.

thank you