Stick with it glen your getting there,I always start with the chassis,mock up everything including engine,rear end and tires,check that the wheels are sitting in the wheel openings and go from there.For dents in the body i use a candle an carefully heat up the inside of the panel you want to add dents,trying to keep away from the edges wheel openings etc.Its great you are trying things and it is the only way to learn.We all lean from our mistakes,I hope this will help you..