So sorry to here about your "unplanned inverted landing". Don't be discouraged, you're in the steep learning curve, now. This is where the real fun starts. Assuming you still have an airplane, here are some things you can check. Make sure the wing and horizontal tail incidences (angles) are correct. Engine thrust angles come into play as well. The more you learn, the more fun you'll have! It's also a question of balance.