How to enter TDZ?

I entered stage 1. Don’t seem to get credit toward overall TDZ. Is there a separate entry required? Is it retroactive if i completed stage 1, or need to repeat?

You have to sign up first and then attend a stage. After you have paired but before you start riding the TdZ banner should be on the left and an option to join. Having joined select one of the events and providing you are in the pen at the start it will be counted.