Take the cabbage from Rane chest, find the travelling merchant that sells potions, grab the elexir.
Ask about rumors in taverns, at some point youre gonna get a location for a red brotherhood hideout. Equip the heaviest armor you can afford and 2 shields, go in, run straight to the chest at the end of the valley ignoring anything else, grab the cabbage, repeat point 1.
After that you should be able to utilize bows just fine assuming you invested in power draw.