What i try to do is on day1, run around gather reeds enough to make 4 hand baskets. (ideally also have enough reeds to make a storage basket as well)
Gathering all Flints and sticks as i go. Eat berries immediately and save up the shrooms that i can find.
When settling down for a base or temporary base thats when i start cutting grass and making tools i might need. Axe, Knife, Hoe etc.