RE: How do I slow down?
I've two offerings. First, program 5-7 mph of wind coming down the runway on your simulater. It will make landing the trainer much easier. The second, is to trim the plane for a proper power off glide slope rather than for level flight at full power. Trainers usually have asymmetrical wings and at faster speeds, they lift more and the elevator very often gets trimmed for full power by trimming it down some. When power is then cut, the plane has down trim and the glide slope is too steep and thus too fast.
Those of us who were mentored by old free flight geezers heard it often... trim the elevator for a proper glide slope and then deal with power on climbing by either reducing power or changing the engine thrust angle.
Assuming the plane is balanced properly, trim the elevator so that when at idle the nose of the plane as others have pointed out, drops only very slightly. This can be tested using lots of altitude by cutting the power and gliding the plane down the length of the runway without giving any elevator control. It should not slow enough that it is hard to maintain coarse, if it does... trim the elevator down slightly. Nor should it descend too rapidly and gain speed, if it does trim the elevator up slightly.
Landings are much easier if the plane is trimmed for a proper glide slope because then it is mostly about keeping the wings level and maintaining course. And, it is now much easier to follow the advice others have offered and manage some up elevator to present some angle of attack along with a little throttle because now the fall back to neutral stick exist.