You have nothing to do, just a normal gameplay. The RTA time depend of your pc and if you don't block the route of the transports.
The last important thing is : when you collect the last transport, place your villager near the wonder and build it.
Each transports are on the water every 25 minutes IGT, protect it for the base of yellow, if you lose one transport it's finish.
================ Secondary objective
At east of map, you have a farm of teal, every 10 minutes IGT you collect 500 food.
For activating Dragonship you must talking at 3 points :
- Monk / IMAGE 1 : https://prnt.sc/mjpo3k at south of the map
- Bombarder / IMAGE 2 : https://prnt.sc/mjpow7 at east of the map
- Villagers at dock / IMAGE 3 : https://prnt.sc/mjppim at north of the map
Every 5 minutes IGT you collect a dragonship (you can't have more than 20 dragonships)
Note : a hidden trigger informs that if we get rid of red and orange, the transport times should stop to spawn instantly, the problem is that I did not find which trigger activates it because it is disabled base and should contain a yellow B flag
IMAGE 4 (Flag B ) : https://prnt.sc/mjqb7k