Basic Hilde Bread&Butter combos usually revolve around moxing C2B launchers into C3A. My go-to combo that you should learn is: 22B C2B (hold down G until Hilde turns around then) C3A. For playing Hilde at a more practical level I would reccomend you remap L1 as A, as this allows you to create charge combos that may be inefficient using standard layout.