If you're only making an account just to look around and see what Cauldron VTT has to offer, please use one of the available demo accounts.
Only create a Cauldron VTT acount when you plan to be a Dungeon Master for your group. When creating an account, you gain the rights to create accounts for your players. Don't let your players create their own account via this form, otherwise they will create their own new group. Only people within the same group will be able to play together.