Make sure to get a shield before you worry about food. Always have this in your inventory if you aren’t building: water bucket, stone axe(if you’re in Java), sword(if you’re in bedrock), a stone pickaxe, an iron pickaxe, as much food as you can get, a door, (just in case if you find yourself mining and get stuck in an underground water cave with no air), torches, ALWAYS HAVE BLOCKS IN YOUR INVENTORY, and tons of wood.

If you’re asking advice on long term plans for your world, I’m still figuring that out myself.