I’m not sure if it opens earlier than 9am, so maybe that’s why you’re being sent back later.
What you need to know about playing is that although you can say which land you want to start in, within each land you will be sent back and forth between portals. You also have to identify where the next portal is from picture clues; this isn’t as easy as it sounds, you may get a picture of an item in the Main St jewellers, or a picture of an ornamentation on a building in Adventure Land. You do have a map showing where the portals are and you can just try each one in turn but you do need to do each one in the correct order to complete the land. They can also be inside or outside, which the map doesn’t show! And you may find yourself going against the flow of people to get to the required portal. And of course there can be queues at each portal.
Once you complete all four lands at level one, where you can play any card at a portal, the next level ramps up the difficulty by requiring a specific card to be played at each portal.
All of which is to say this is fun but addictive and time consuming. When we have done it we do it for a morning or afternoon when we don’t have a touring plan. It will drive some Liners totally insane with the back-tracking and unpredictability of it.