Hey! I'd just like some advice on how to make money in this game, I can't sell anything back to the game, so I'm not sure how to earn anything. I can do the explores, but I don't get a lot each island, and quests are hard since I haven't got that many pets yet.

my goal is to just expand my warehouse right now, but its pretty expensive in the state store considering I'm struggling to find out how to make money. 

is there something Im missing ? Like a place where I can sell items back for money, or a daily drop? 
(I know about the townhall but it's not very much)

You could put thigs you dont need on trades.. but thn theres a chance it wont be bought for a while, Selling pets and puting mbad gened pets in pound, along with quests aree how i mostly make my money since i dont have time for quests anymore sadly

The longer you play the game the better you will be at quests

There is a pretty good guide on how to get some silver in Player Guides: https://beastkeeper.com/thread/3358