Welcome AH2!!!

Mouse users who have a wheel in the center for scrolling can use it for throttle. In fact, I think it already defaults to it for new folks.
Once you ave the engine run up you can hit the P key on your keyboard for additional, though sometimes short lived, boost.
P = War Emergency Power (WEP).
G = gear up and down (toggles) If you leave it up and get too fast it will depart the plane. Suggest you get it up by 150 knots and don't drop it until you're back down to 150 again .
Flaps are Q and W keys.
If the plane tries to turn left on takeoff roll it is due to torque from the engines prop. You can maintain directional control by using a = rudder left, s = rudder center and d = rudder right.
Remember these are prop jobs so point nose up houses get smaller. Point nose up more, houses get bigger.
Hope this helps and drop into the training area. We'll help you get setup.