Practice will always teach you the perfect approach for the plane.
200' is like an aircraft carrier for some of the faster models, but you
should be able to set that plane down easily in that distance...
all in good time.

You'll know when you've finally got it, because you'll be finess'ing the throttle on final,
to pick your touchdown spot. I try to shoot for wheel touchdown "Just"
across the edge of the runway, on pavement, whenever possible.

Shoot a lot of missed aproaches and touch & goes. It just takes time.

Also, make sure your engine is idling down, and that you have the right prop.

Another thing that used to help me, when I was learning, was to pay attention
whenever someone was flying the same model I was having trouble with.
Watch them from the minute they turn downwind... pay attention to their
engine's sound, the height at certain points of the pattern, etc...
If you need help, get one of the guys who always greases it in to coach you a bit!
You'll get it sooner or later
Just don't be stingy with the fuel... every gallon you burn makes it that much easier!