The aircraft collided with an obstacle during a go-around from the Red Creek private dirt strip. The pilot reported that he had never landed at the 2000 ft dirt strip and had no other short or soft field takeoff/landing practice beyond his instruction at an 8000 ft paved runway and practice takeoffs and landings at an abandoned dirt strip in the desert four days prior to the planned flight. The pilot got too low on his approach. He compensated for his low approach by increasing his angle of attack. When the pilot realized the aircraft attitude was too high and his airspeed too low, he initiated a go-around. He added full power, made a shallow bank to the left, and retracted 20 degrees of flaps. The aircraft lost the remaining altitude and collided with a steel fence post. The aircraft nosed over about 30 ft to the left of the landing strip and about 500 ft past the threshold.