Welp... the first thing we need to do from the start is go to the Burning Keg tavern to finish the rat quest, right? And there are drunkards inside the Burning Keg tavern... yeah? Aaaand... If drunks just... you know... die for some reason... well... the Large and Small Copper Coins can drop out of them;)

Yes, at the very beginning it is problematic to kill them... since you will spend a lot of your stamina... buuuuut... who said you have to kill them personally? The Burning Keg owner (Big Mom) doesn't like when people fight in her tavern... therefore you can agro somebody and Big Mom will immediately kill him/her/it and you can easily pick up loot from dead bodies~

1) Find any person that big mommy sees
2) Attack drunkard from afar or stun at close range
3) Big Mom will notice this and attack him thinking he is fighting
4) She might get attacked by the others in this bar
5) Big Mom kill all (make sure no one comes to the Grey Rat and Cecilly or they will die)
6) Сollect things from the dead
[Repeat ⟳] - Go to the second floor of the Burning Keg tavern and go down the stairs (Drunkards respawn)
You don't have to worry about food because food also drops from the drunkards

Yes... it's a long method but it's really possible to leave the Noer island in 1 day without becoming a pirate slave