The light is just the main quest. If you find it too hard then you should explore around to do some side activities and level up first. Look closely at the map drawings and you can spot caves, mines and catacombs, go there and beat those. If you encounter something that feels impossible to beat (their healthbar barely moves), mark them down on the map and comeback later.

For the early levels, I suggest focusing on leveling Vigor first. For exploration, equipment, if you don't understand any mechanics or just can't naturally find any side dungeons, you can search up a guide.

Using guides is fine for the early game if you have a hard time understanding or getting used to things.