Id' agree with daveo on getting a more conventional trainer and an instructor. If you can't do the instructor thing then I'd also agree that you need to get Real Flight G2 or G2 Lite. The Lite version with a Futaba styled interface is available for about $130.00 most places.

Several hours flying the PT-40 in Real Flight and actually practicing take-offs, landings, touch and goes etc, will allow you to develop the required eye motor loop without crashing a real plane in the first 30 seconds. It ends up being much cheaper, much faster and much less frustrating in the end. If you can get to the point of flying G2 Lite PT-40 well on the advanced setting with some light wind andmoderate thermal activity, you can probably solo without crashing too badly.

While not the ideal trainer, you could also consider a Duraplane Trainer 40. It's relatively heavy and requires a little more speed and throttle on landing but does have a decent airfoil, actually flies fairly well despite the weight and stall speed, is quite aerobatic, is hard to damage and easy to repair. It offers a good compromise between durability and flying traits for an instructorless student pilot.