What pulls you to the left on takeoff is engine torque effects.
Before throttling up pull back 1/2 on your Joystick to lock the tailwheel (reduces "maneuverability" of your tail). then throttle up to full slowly. Use the RUDDER (a and d keys, s to center) to keep the plane on the runway (Gentle inputs, no overcorrection). As you gain speed the torque effects are less noticable and you can slowly relax the stick back to center position to keep the wheels on the runway a little longer. If you dont youll be airborne at stall speed and have a good chance on crashing.
Keep your climb shallow at first, as soon as you clear the treetops level off and get some speed up before you start climbing or maneuvering.
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