Tick anything you already have, in any order. Quests unlock once this is done.
Heavier gravity, no daylight, one ocean. Speculative biology is only interesting when the creature is an answer to a problem, rather than a shape you liked.
Find one near you2 things left above. Quests are real things you go and do, so they only make sense once you have what you need.
First one waiting: Read some speculative biology projects