Dont worry as soon as you get a full set of bronze armour, a bronze shield and bronze sword. The meadows and black forest become incredibly easy. Just make sure you always have 3 foods to give you extra health points and stamina... cooked deer, cooked boar and honey.
If you are fighting a troll, its best to make it follow you into a wide open area, where you can just keep on running around it rather than stay stationary, keep a distance between you and the troll and use flaming arrows to kill it. If you stay still and the troll gets close, it kills you easily.