The 304-hour private pilot reported the single-engine airplane began to swerve back and forth during the landing roll on runway 34. The pilot elected to abort the landing; however, during the takeoff roll the pilot realized he did not have sufficient airspeed for lift-off. The tricycle gear equipped airplane overran the departure end of the 1,900-foot long by 65-feet wide grass runway. The airplane continued down an embankment. The winds were reported as light and variable at the time of the accident. The pilot reported having accumulated a total of 46 hours in the same make and model of airplane. The pilot also reported that the accident could have been prevented by additional training in short field landings in this make and model aircraft. The pilot did not report any mechanical malfunctions or anomalies with the airplane.