Hit the Sandbox.
Make a simple track.. A single out and back circle. No fancy stuff. Set the lift hill to about 50 - 60 meters.
Run a test and look at the speed of the car around the track (use the Heatmaps).
On the return section (on the opposite side to the lift hill), start playing with 1 hump/camelback....
Make it about 30 Meters tall, and give it a gentle approach and exit....
Run the test and then look at the Heatmaps, specifically for Vertical-G and Speed.
Then experiment with that 1 hump, make the approach steeper, or the exit steeper, play with them and check the heatmaps after each change.
Keep adjusting them and playing with the angles in the track. Its also a great way to practice with the Coaster Editor tools too...