If it bounces you're too fast. Ideally the wheels touch the ground just as the plane's wing stalls. I don't get it right every time, but I know what it looks like when it's right, and I keep trying. Same thing with full scale, the plane won't stay on the ground till it's done flying. Tailwheel planes can be wheel-landed and held down at above stall speed, but it's a chancy thing, and can lead to a ground-loop if you aren't quick on the sticks.