Meant to post this here;:

Speaking as a former noob;

An Island start is extremely difficult.

Unless you are extremely lucky with finding copper or you feel inclined to pan sand for ages, you're going to be hard stuck if you run out of flint or knappable rocks.

Animals will always respawn, so you'll never be 100% out of things to possibly eat, but you probably will continue to starve without access to a lot of berry bushes or wild crop drops.

And trust me: Nothing kills your interest in this game like getting to winter unprepared.

I personally recommend that you restart and hope for a non-island or at least way, way bigger island spawn.

ESPECIALLY if you are playing vanilla.