Level is not the only requirement
Equipment can require a particular level, race, class and mastery. If an item cannot be equipped, read its requirements before buying a replacement.
Train what you use
Weapon, defence, shield, skill and Force progression are separate. Train the abilities your class uses rather than relying on character level alone. Mastery caps depend on your level and class path.
Choose a manageable hunt
Use quest objectives and enemy difficulty to choose a hunting area. Bring compatible ammunition and enough potions; join a party when you cannot sustain the fight alone.