One of the quests was to complete a Nature aspiration goal. So if your sim doesn't have the Nature aspiration I am assuming you must change your sim's Aspiration to complete that goal? Not sure exactly how I go about doing that but is there a potion you have to drink (or your sim has to drink) to change Aspirations under the Rewards store?
I changed my aspiration to the collector goals and was going to go digging, but I did something on my lot and it checked off for me. So, it seems you don't need to change your aspiration - the game uses some sort of fairy magic to find it and check it off for you. 😁
I wish that fairy magic would work universally. I can't tell you how many times I forget to change to the friend aspiration when greeting others or I don't catch it quick enough to change to the comedy one when my sim autonomously tells a joke.
